AP Exhaust 642024 Catalytic Converter - Rear

OE Quality 60-Day Returns

AP Exhaust 642024 Catalytic Converter - Rear

Brand	AP Exhaust 642024
Position	Rear
Body Material	Stainless steel
Inlet Gasket	Yes
Inlet Hardware	Yes
Inlet Type A	2 bolt welded flange w/ female flare
O2 Sensor Ports	None
Outlet Gasket	Not required
Outlet Hardware	Yes
Outlet Type A	2.12" od pipe
Overall Length (IN)	20.5
Substrate Material	Ceramic
Type	Federal / epa direct-fit
Fits	Lexus and Toyota · 14 vehicles

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

Stainless steel body. Helps resist corrosion for long-lasting exhaust performance.

Ceramic substrate. Supports efficient converter operation with proprietary loading.

Cross-references 17420-20400 for the same application. See all 1.

$271.03Free 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.

Confirm position

Select your vehicle to confirm fitment

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

Step 2 — Quantity

Free shipping to the continental U.S.

Free returns within 60 days if it doesn't fit when fitment is verified.

Not what you need? See all Catalytic Converter options

Direct-Fit Catalytic Converter for Lexus and Toyota

AP Exhaust 642024 is a Federal / EPA direct-fit catalytic converter built for specific Lexus RX400h and Toyota Highlander applications. It uses a stainless steel body with a ceramic substrate and OE-style dimensions to support proper exhaust fitment on the listed vehicles.

Key Features

Federal / EPA direct-fit catalytic converter
Stainless steel body for corrosion resistance
Ceramic substrate material
2-bolt welded flange inlet with female flare
2.12 inch OD pipe outlet
Inlet gasket, inlet hardware, and outlet hardware included
No O2 sensor ports
Overall length: 20.5 inches

Product Details

AP Exhaust 642024 is engineered to match OE dimensions and fitment for the listed Lexus RX400h and Toyota Highlander rear converter applications. The converter uses AP Emissions Technologies’ ARISTO substrate chemistry and advanced manufacturing processes to support efficient catalyst loading and consistent build quality. This part number is a direct replacement for vehicles that require a Federal / EPA direct-fit catalytic converter with a welded-flange inlet and 2.12 inch outlet connection.

This part cross-references 17420-20400 for the same application.

What It Helps Address

Failed catalytic converter efficiency codes
Restricted exhaust flow from a worn converter
Emissions test failure related to converter performance
Exhaust leaks at the converter connection points
Fitment issues on OE welded-assembly exhaust layouts

Installation Notes

Fits 2006-2008 Lexus RX400h, N/A.
Fits 2006-2008 Lexus RX400h, Rear.
Fits 2006-2007 Toyota Highlander, Rear.
Fits 2006-2007 Toyota Highlander, Rear.
Some listed applications require a welded assembly to complete installation.
OE systems on certain vehicles must be cut off 3 inches behind the rear converter weld.
Federal and California emissions applications are noted for the listed vehicles; restrictions apply in CA, CO, ME, and NY.

Quality Assurance

AP Exhaust builds this converter to OE dimensions using automated workstations, spinner welding equipment, and high-speed production lines for consistent fitment and assembly control. The stainless steel construction and ceramic substrate are selected to support long-term exhaust service in the specified Lexus RX400h and Toyota Highlander applications.

This part fits 14 vehicles

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

Year	Make	Model	Submodel	Liters	Cylinders	Fuel Type	Position	Notes
2008	Lexus	RX400h	—	3.3L	V6	ELECTRIC/GAS	N/A	Direct Fit; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.; The O.E. system must be cut off 3" behind the rear converter weld.
2008	Lexus	RX400h	—	3.3L	V6	—	Rear	Direct Fit; Requires Welded Assembly 7885 to Complete Installation; 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.
2007	Lexus	RX400h	—	3.3L	V6	ELECTRIC/GAS	N/A	Direct Fit; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.; The O.E. system must be cut off 3" behind the rear converter weld.
2007	Lexus	RX400h	—	3.3L	V6	—	Rear	Direct Fit; Requires Welded Assembly 7885 to Complete Installation; 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.
2007	Toyota	Highlander	Hybrid Limited	3.3L	V6	ELECTRIC/GAS	Rear	Direct Fit; (Main Conv.); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.; The O.E. system must be cut off 3" behind the rear converter weld.
2007	Toyota	Highlander	Hybrid	3.3L	V6	ELECTRIC/GAS	Rear	Direct Fit; (Main Conv.); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.; The O.E. system must be cut off 3" behind the rear converter weld.
2007	Toyota	Highlander	Hybrid	3.3L	V6	ELECTRIC/GAS	Rear	Direct Fit; Requires Welded Assembly 7885 to Complete Installation; 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.
2007	Toyota	Highlander	Hybrid Limited	3.3L	V6	ELECTRIC/GAS	Rear	Direct Fit; Requires Welded Assembly 7885 to Complete Installation; 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.
2006	Lexus	RX400h	—	3.3L	V6	ELECTRIC/GAS	N/A	Direct Fit; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.; The O.E. system must be cut off 3" behind the rear converter weld.
2006	Lexus	RX400h	—	3.3L	V6	—	Rear	Direct Fit; Requires Welded Assembly 7885 to Complete Installation; 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.
2006	Toyota	Highlander	Hybrid	3.3L	V6	ELECTRIC/GAS	Rear	Direct Fit; (Main Conv.); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.; The O.E. system must be cut off 3" behind the rear converter weld.
2006	Toyota	Highlander	Hybrid Limited	3.3L	V6	ELECTRIC/GAS	Rear	Direct Fit; (Main Conv.); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.; The O.E. system must be cut off 3" behind the rear converter weld.
2006	Toyota	Highlander	Hybrid	3.3L	V6	ELECTRIC/GAS	Rear	Direct Fit; Requires Welded Assembly 7885 to Complete Installation; 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.
2006	Toyota	Highlander	Hybrid Limited	3.3L	V6	ELECTRIC/GAS	Rear	Direct Fit; Requires Welded Assembly 7885 to Complete Installation; 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.
No rows match your filter.

Directly replaces or cross-references 1 part number

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

17420-20400