AP Exhaust 645858 Catalytic Converter

Name: AP Exhaust 645858 Catalytic Converter
Brand: AP Exhaust
SKU: BBDL-645858
Price: 285.92 USD
Availability: OutOfStock

⚙️ 36 vehicles fit this part

🔍

Select your vehicle to confirm fitment

Verify this part fits before purchasing — free returns if it doesn't

$285.92Free Shipping

🚚Free ShippingNo Cost to Continental U.S.

🔄Free Returns*Wrong fit? No cost

🛡️60-Day ReturnsMoney back guarantee

*Free return shipping only qualifies if our fitment verification tool is used.

Out of Stock

✅OE Direct Replacement — Bolt-on fit, no modifications needed

🚗Fitment: Dodge, Ram 1500, Ram 2500, and Ram 3500

🔄Easy Returns — Return within 60 days for a full refund

🚚Fast Shipping — Most orders ship same business day before 1pm CST

Not what you need? Click here for all Catalytic Converter options

AP Exhaust Catalytic Converter for Dodge Ram 1500, 2500, 3500

The AP Exhaust catalytic converter part number 645858 is designed specifically for Dodge Ram 1500, Ram 2500, and Ram 3500 models. Constructed with durable stainless steel and a ceramic substrate, this federal/EPA direct-fit converter ensures compliance with emissions standards while maintaining vehicle performance.

Body material: corrosion-resistant stainless steel
Federal/EPA direct-fit catalytic converter
Inlet and outlet: 2 bolt loose flange with spherical flare
Two O2 sensor ports for accurate emissions monitoring
Overall length of 57.5 inches for precise fitment
Outlet pipe diameter: 2.50 inches
Outlet hardware included for secure installation
No inlet gasket or hardware required

Durable Construction and Precise Fitment

This AP Exhaust catalytic converter (part number 645858) features a stainless steel body that resists rust and corrosion, extending the life of the exhaust component. The ceramic substrate inside effectively reduces harmful emissions by converting exhaust gases into less harmful substances. The inlet and outlet connections use a 2 bolt loose flange with spherical flare design, ensuring a secure and leak-free fit on compatible Dodge Ram 1500, 2500, and 3500 trucks. Two O2 sensor ports allow for proper sensor placement, maintaining accurate engine management and emissions control.

Compatible Dodge Ram Models and Applications

This catalytic converter is compatible with the following Dodge Ram models:

Dodge Ram 1500
Dodge Ram 2500
Dodge Ram 3500

It is designed to meet federal and EPA emissions requirements, making it suitable for vehicles requiring direct-fit replacement converters without modifications.

Common Issues Addressed by This Catalytic Converter

Check engine light triggered by faulty or clogged catalytic converter
Failed emissions tests due to converter inefficiency
Reduced engine performance and fuel economy from exhaust restrictions
Excessive exhaust emissions impacting environmental compliance
Damaged or corroded original catalytic converter

Installation Notes and Tips

The AP Exhaust catalytic converter 645858 is designed for direct-fit installation on Dodge Ram 1500, 2500, and 3500 models. No inlet gasket or hardware is required, simplifying the replacement process. Outlet hardware is included to secure the connection. Ensure proper alignment of the 2 bolt loose flange with spherical flare connections and verify O2 sensor port placement before final tightening. Professional installation is recommended to maintain emissions compliance and vehicle performance.

Quality Assurance and Warranty

Manufactured by AP Exhaust, this catalytic converter meets federal and EPA standards for emissions control. The stainless steel construction and ceramic substrate provide durability and long service life. Warranty information is available from the manufacturer and should be confirmed at the time of purchase.

Brand	AP Exhaust
Part Number	645858
Body Material	Stainless steel
Inlet Gasket	Not required
Inlet Hardware	None
Inlet Type A	2 bolt loose flange w/ spherical 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)	57.5
Substrate Material	Ceramic
Type	Federal / epa direct-fit

This part fits 36 vehicles. Search below:

Year	Make	Model	Liters	Cylinders	Wheel Base	Position	Notes
2001	Dodge	Ram 1500	5.2L	V8	119.0"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 1500	5.2L	V8	155.0"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 1500	5.2L	V8	135.0"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 1500	5.2L	V8	139.0"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 1500	5.9L	V8	135.0"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 1500	5.9L	V8	139.0"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 1500	5.9L	V8	119.0"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 1500	5.9L	V8	155.0"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 1500	5.2L	V8		N/A	Direct 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.
2001	Dodge	Ram 1500	5.9L	V8		N/A	Direct 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.
2001	Dodge	Ram 2500	5.9L	V8	138.7"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 2500	5.9L	V8	154.7"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 2500	5.9L	V8	134.7"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 2500	5.9L	V8		N/A	Direct 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.
2001	Dodge	Ram 3500	5.9L	V8	138.7"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 3500	5.9L	V8	154.7"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 3500	5.9L	V8	135.0"	N/A	Direct Fit; (00-01); 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.
2001	Dodge	Ram 3500	5.9L	V8		N/A	Direct 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.
2000	Dodge	Ram 1500	5.2L	V8	119.0"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 1500	5.2L	V8	135.0"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 1500	5.2L	V8	139.0"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 1500	5.2L	V8	155.0"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 1500	5.9L	V8	119.0"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 1500	5.9L	V8	135.0"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 1500	5.9L	V8	139.0"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 1500	5.9L	V8	155.0"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 1500	5.2L	V8		N/A	Direct 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.
2000	Dodge	Ram 1500	5.9L	V8		N/A	Direct 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.
2000	Dodge	Ram 2500	5.9L	V8	154.7"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 2500	5.9L	V8	134.7"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 2500	5.9L	V8	138.7"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 2500	5.9L	V8		N/A	Direct 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.
2000	Dodge	Ram 3500	5.9L	V8	135.0"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 3500	5.9L	V8	138.7"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 3500	5.9L	V8	154.7"	N/A	Direct Fit; (00-01); 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.
2000	Dodge	Ram 3500	5.9L	V8		N/A	Direct 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.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.