aFe Front Catalytic Converter Assembly — Jeep Wrangler TJ 4.0L, 2000–2003

Direct-fit front catalytic converter assembly for Wrangler TJ 2000–2003 gas I6 4.0L

The aFe 47-48001 front catalytic replacement includes the twin-catalyst front assembly, a separate rear downpipe section and one 2.5-inch band clamp. Current exact manufacturer specifies mandrel-bent stainless construction, hand MIG welding, factory mounting points and 3/8-inch laser-cut flanges. The rear tube is not a separately supplied rear catalytic converter. EPA-compliant manufacturer wording does not establish every vehicle’s emissions or state eligibility.

Key Features

• Selected aFe part 47-48001.
• Exact current manufacturer and guide scope: Wrangler TJ 2000–2003 gas I6 4.0L front catalytic assembly only.
• Two physical sections: front replacement with two catalysts 05-144111 and rear downpipe 05-144107.
• One 2.5-inch band clamp 05-41061 and one warranty card 06-00140 in the formal guide list.
• Mandrel-bent stainless, hand MIG welding and 3/8-inch flanges at factory mounting locations. Exact stainless grade is not printed.
• Original four manifold bolts, three outlet nuts and oxygen sensors are removed, retained and restored. No selected cutting or crossmember-removal instruction is printed.
• Manufacturer excludes sale/use on California-certified vehicles. Confirm exact certification, legitimate documented replacement need, warranty status and current state/local rules before purchase or installation.

Fitment

Current exact manufacturer and selected complete guide specify Wrangler TJ 2000–2003 gas I6 4.0L. The complete exact-MPN named table supports all four existing named ranges without extension or new groups. Match the actual front catalytic layout, emissions label and factory connections; no 1997–1999 single-converter or 2004–2006 front assembly interchange is inferred. Physical fitment does not establish emissions eligibility. Confirm lawful documented replacement need, warranty status and current applicable federal/state/local requirements before purchase or installation.

Specifications

What's Included

• The 47-48001 kit includes one front replacement with two catalysts 05-144111 and one rear downpipe replacement 05-144107.
• One 2.5-inch band clamp 05-41061 and one warranty card 06-00140.
• Original manifold bolts, downstream nuts and oxygen sensors are reused. No rear catalytic converter, new gasket, new oxygen sensor, intake filter or intake coupling is established as included.

About aFe Power

aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.

Related Parts

• Exact selected front assembly, application and emissions qualification
• Complete selected twelve-step guide and formal two-section parts list
• Complete exact-MPN named application table
• EPA replacement-converter guidance; verify current applicable requirements
• Shop direct-fit catalytic converters
• Shop aFe Power

FAQ

It is a two-section stainless front catalytic assembly for documented 2000–2003 Wrangler TJ gas I6 4.0L, containing two front catalysts, a rear tube and one band clamp.

No. The formal list identifies front replacement with cats 05-144111 and rear downpipe 05-144107. The rear tube is not a separately included rear catalyst.

The selected list contains the front assembly, rear tube, one 2.5-inch band clamp and warranty card. Original four manifold bolts, three outlet nuts and oxygen sensors are reused. New gaskets, flange fasteners and sensors are not promised.

No. It identifies the tool size for the original manifold bolts. The selected guide supplies no numerical torque; use applicable exact vehicle service specifications.

No such operation is printed in this selected guide. Do not borrow those procedures or the later two-clamp tube arrangement from another converter selection.

Remove and reinstall the original front/rear oxygen sensors in the correct locations. The guide disconnects the negative battery terminal but omits a final reconnection step; confirm the exact final restoration procedure before starting.

No. The manufacturer excludes California-certified vehicles. Verify exact emissions certification, lawful documented replacement need, warranty status and current applicable state/local requirements. No blanket 49-state or inspection-pass guarantee is made.

Support it and use assistance before releasing the four manifold bolts so the catalysts cannot fall. Fit sections loose, align before tightening, restore all sensors and recheck all bolts/nuts/clamp after 50–100 miles.

Installation Instructions

1. Confirm aFe 47-48001 against the exact vehicle and installed equipment. Inventory the actual components and follow the selected manufacturer instructions and current vehicle service requirements.
2. Confirm exact 2000–2003 TJ gas I6 4.0L front assembly, installed emissions configuration and lawful documented replacement eligibility. Read the complete selected guide and obtain exact vehicle service specifications and its missing final battery-restoration procedure before beginning.
3. Allow the exhaust to cool, use protective equipment and safely support the vehicle on specified jack-stand points. Disconnect the negative battery terminal as printed. Remove and retain the original oxygen sensors at the front/rear positions.
4. Remove the three nuts at the downstream exhaust connection. With the assembly supported and a helper available, remove the four original manifold bolts using the specified 15 mm tool. Remove the old assembly without allowing the catalysts to fall.
5. Install the new front catalytic assembly at the original manifold using retained original bolts, initially loose. Fit the rear downpipe at the original exhaust connection with the three retained nuts, initially loose, and assemble the supplied slip joint with its one 2.5-inch band.
6. Position the assembly correctly before final fastening. Tighten the four original manifold bolts and three outlet nuts to applicable vehicle requirements; no numerical torque is printed. Reinstall all original oxygen sensors in their correct positions. The guide prints step 9 before step 8; both operations remain required.
7. Recheck all work and complete battery restoration using the exact procedure confirmed before work. Safely lower the vehicle and recheck all bolts/nuts/clamp after 50–100 miles. No cutting, crossmember removal, new sensor, catalyst deletion, tuner or later-kit clamp torque is borrowed.

California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.