AP Exhaust 645937 Catalytic Converter
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AP Exhaust

AP Exhaust 645937 Catalytic Converter

Brand AP Exhaust 645937
Body Material Stainless steel
Inlet Gasket Not required
Inlet Hardware None
Inlet Type A 2 bolt loose flange w/ female flare
Inlet Type A 2 bolt loose flange w/ spherical flare
Inlet Type B 2 bolt loose flange w/ female flare
Inlet Type B 2 bolt loose flange w/ spherical flare
O2 Sensor Ports 2
Outlet Gasket Not required
Outlet Hardware Yes
Outlet Type A 2.50" od pipe
Overall Length (IN) 57.25
Substrate Material Ceramic
Type Federal / epa direct-fit
Fits Dodge · 80 vehicles

Direct-fit replacement. Built to exact OE dimensions for straightforward installation.

Stainless steel body. Resists corrosion for long-term durability.

Ceramic substrate. Delivers efficient converter performance.

$262.18Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $262.18
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
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AP Exhaust 645937 Catalytic Converter

AP Exhaust 645937 is a Federal / EPA direct-fit catalytic converter built for specific Dodge Ram applications. It uses a ceramic substrate and stainless steel body construction to support OE-style fitment, emissions control, and durable service on the truck platform.

Key Features

  • Federal / EPA direct-fit catalytic converter
  • Stainless steel body material for corrosion resistance
  • Ceramic substrate material
  • 2 O2 sensor ports
  • 2.50" OD pipe outlet
  • Overall length: 57.25 in.
  • Inlet and outlet gaskets not required
  • Outlet hardware included; inlet hardware not included

Product Details

Part number 645937 is engineered to match OE dimensions and fitment for select Dodge Ram 1500, Ram 2500, and Ram 3500 trucks. AP Exhaust uses automated manufacturing processes and spinner welding equipment to help maintain consistent dimensions and assembly quality. The ARISTO substrate chemistry is used to support efficient catalyst loading and converter performance while keeping the design focused on direct replacement fitment. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Compatible With: 1994 Dodge Ram 2500; 1995-1997 Dodge Ram 2500; 1996-1999 Dodge Ram 1500; 1996-1999 Dodge Ram 2500; 1998-1999 Dodge Ram 2500; 1998-1999 Dodge Ram 3500. AP Exhaust 645937 is a direct-fit solution for owners searching for a catalytic converter for Dodge Ram 1500, Ram 2500, or Ram 3500 trucks with Federal and California emissions configurations listed in the fitment data.

Common Issues This Part Can Address

  • Failed catalytic converter efficiency codes
  • Restricted exhaust flow from a worn converter
  • Rattling or deteriorated internal substrate
  • Exhaust leaks at the converter connection points
  • Emissions test failure related to converter performance

Installation Notes

Verify the vehicle year, model, emissions configuration, and GVW notes before installation. This converter uses a 2-bolt loose flange inlet with female flare or spherical flare options and a 2.50" OD pipe outlet. Outlet hardware is included, while inlet hardware is not. Because fitment notes vary by model year and emissions package, confirm the exact application against the vehicle identification and local emissions requirements before replacing the original converter.

Quality Assurance

AP Exhaust builds this converter to OE dimensions using controlled manufacturing processes for consistent fitment and assembly. The stainless steel body and ceramic substrate are selected to support long-term exhaust service in the specified Dodge Ram applications.

Related reading

This part fits 80 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelBody TypeDrive TypeLitersCylindersWheel BasePositionNotes
1999DodgeRam 1500—RWD3.9LV6135.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500—RWD3.9LV6139.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500—RWD3.9LV6119.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500—RWD3.9LV6155.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500——5.2LV8119.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500——5.2LV8155.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500——5.2LV8139.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500——5.2LV8135.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500——5.9LV8155.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500——5.9LV8135.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500——5.9LV8119.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500——5.9LV8139.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500——3.9LV6—N/ADirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500——5.2LV8—N/ADirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 1500——5.9LV8—N/ADirect Fit; R1500; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 2500——5.9LV8134.7"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 2500——5.9LV8138.7"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 2500——5.9LV8154.7"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 3500——5.9LV8139.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 3500——5.9LV8154.7"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1999DodgeRam 3500——5.9LV8135.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500—RWD3.9LV6155.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500—RWD3.9LV6139.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500—RWD3.9LV6119.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500—RWD3.9LV6135.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500——5.2LV8135.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500——5.2LV8119.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500——5.2LV8139.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500——5.2LV8155.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500——5.9LV8119.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500——5.9LV8155.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500——5.9LV8139.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500——5.9LV8135.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500——3.9LV6—N/ADirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500——5.2LV8—N/ADirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 1500——5.9LV8—N/ADirect Fit; R1500; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 2500——5.9LV8134.7"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 2500——5.9LV8138.7"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 2500——5.9LV8154.7"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 3500——5.9LV8139.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 3500——5.9LV8154.7"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1998DodgeRam 3500——5.9LV8135.0"N/ADirect Fit; (98-99); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1997DodgeRam 1500——5.2LV8135.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.; under 8800 lbs. G.V.W.
1997DodgeRam 1500——5.9LV8135.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.; under 8800 lbs. G.V.W.
1997DodgeRam 1500—4WD5.2LV8119.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1997DodgeRam 1500—RWD5.2LV8119.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1997DodgeRam 1500—4WD5.9LV8119.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1997DodgeRam 1500—RWD5.9LV8119.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1997DodgeRam 1500Extended Cab Pickup—5.9LV8155.0"N/ADirect Fit; (Under 8800 lbs. GVW); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.; under 8800 lbs. G.V.W.
1997DodgeRam 1500——3.9LV6135.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1997DodgeRam 1500—RWD3.9LV6119.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1997DodgeRam 1500——3.9LV6—N/ADirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1997DodgeRam 1500——5.2LV8—N/ADirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1997DodgeRam 1500——5.9LV8—N/ADirect Fit; R1500; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1997DodgeRam 2500Extended Cab Pickup—5.9LV8138.7"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.; under 8800 lbs. G.V.W.
1997DodgeRam 2500Extended Cab Pickup—5.9LV8154.7"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.; under 8800 lbs. G.V.W.
1997DodgeRam 2500——5.9LV8134.7"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1997DodgeRam 2500——5.9LV8134.7"N/ADirect Fit; (Under 8800 lbs. GVW); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1996DodgeRam 1500——5.2LV8135.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.; under 8800 lbs. G.V.W.
1996DodgeRam 1500——5.9LV8135.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.; under 8800 lbs. G.V.W.
1996DodgeRam 1500—4WD5.2LV8119.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1996DodgeRam 1500—RWD5.2LV8119.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1996DodgeRam 1500—4WD5.9LV8119.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1996DodgeRam 1500—RWD5.9LV8119.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1996DodgeRam 1500Extended Cab Pickup—5.9LV8155.0"N/ADirect Fit; (Under 8800 lbs. GVW); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.; under 8800 lbs. G.V.W.
1996DodgeRam 1500——3.9LV6135.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1996DodgeRam 1500—RWD3.9LV6119.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1996DodgeRam 1500——3.9LV6—N/ADirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1996DodgeRam 1500——5.2LV8—N/ADirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1996DodgeRam 1500——5.9LV8—N/ADirect Fit; R1500; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1996DodgeRam 2500Extended Cab Pickup—5.2LV8139.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.; under 8800 lbs. G.V.W.
1996DodgeRam 2500Extended Cab Pickup—5.2LV8155.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.; under 8800 lbs. G.V.W.
1996DodgeRam 2500Extended Cab Pickup—5.9LV8155.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.; under 8800 lbs. G.V.W.
1996DodgeRam 2500Extended Cab Pickup—5.9LV8139.0"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.; under 8800 lbs. G.V.W.
1996DodgeRam 2500——5.2LV8134.7"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1996DodgeRam 2500——5.9LV8134.7"N/ADirect Fit; (96-97); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1996DodgeRam 2500——5.9LV8134.7"N/ADirect Fit; (Under 8800 lbs. GVW); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1996DodgeRam 2500——5.2LV8—N/ADirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1995DodgeRam 2500——5.9LV8135.0"N/ADirect Fit; (Under 8800 lbs. GVW); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
1994DodgeRam 2500——5.9LV8135.0"N/ADirect Fit; (Under 8800 lbs. GVW); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.; after 9-27-93