Exhaust Headers Polished Stainless Steel for 1991-1999 Jeep Wrangler Cherokee Grand Cherokee YJ TJ XJ ZJ 4.0L

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Sale price $159.99 USD Regular price $179.99 USD
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SKU: AM-33003

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Key Features

Compatibility

These exhaust manifolds are designed for 1991-1999 Jeep Wrangler YJ/TJ, Cherokee XJ, and Grand Cherokee ZJ with the legendary 4.0L inline-six engine. Direct bolt-on replacement for factory exhaust manifolds.

Performance Gains

These Jeep Wrangler headers are dyno-tested to deliver 10-15 HP and torque gains by improving exhaust flow and reducing backpressure. The optimized design enhances throttle response for both street and off-road driving.

T304 Stainless Steel

Mandrel-bent shorty headers made from 304 stainless steel resist corrosion and high heat, delivering long-term durability for daily driving and off-road use. The polished finish looks great and provides additional protection.

Direct Bolt-On

CNC-machined flanges and factory-matching bolt locations ensure these Jeep Cherokee headers install without modifications. Designed to solve the common cracked manifold problem on Jeep 4.0L engines.

TIG Welded

Precision TIG-welded joints create gap-free seams that resist vibration and high temperatures, reducing the chance of cracks or leaks. Includes all necessary gaskets and hardware for installation.

Description

The AMC/Jeep 4.0L inline-six engine is legendary for its torque and reliability. Our 4.0L Jeep exhaust headers help unlock even more performance from this robust powerplant. Whether you're crawling trails in your Wrangler, exploring backroads in your Cherokee, or daily driving your Grand Cherokee, these headers deliver measurable improvements.

Factory exhaust manifolds on Jeep 4.0L engines are known to crack over time due to thermal stress. Our TJ headers replace those problematic cast iron manifolds with durable stainless steel construction that withstands the extreme conditions Jeep owners put their vehicles through.

The Jeep YJ exhaust headers feature optimized primary tube lengths and smooth internal transitions that improve mid-range torque - exactly what you need when navigating challenging terrain or merging onto highways. The polished stainless steel finish not only looks great but also provides excellent corrosion resistance.

At AMVirtuo, we believe performance upgrades shouldn't break the bank. These Jeep Grand Cherokee headers offer professional-grade quality at a price that respects your budget, backed by our commitment to helping Jeep enthusiasts get more from their vehicles.

Vehicle Fitment

Vehicle Years Engine
Jeep Wrangler YJ 1991-1995 4.0L I6
Jeep Wrangler TJ 1996-1999 4.0L I6
Jeep Cherokee XJ 1991-1999 4.0L I6
Jeep Grand Cherokee ZJ 1993-1999 4.0L I6

⚠️ Important Fitment Notes

Engine Compatibility: Designed for Jeep 4.0L inline-six (SOHC) engines only. Not compatible with 2.5L or 4-cylinder engines.

Cracked Manifold Solution: These stainless steel headers are designed to replace the problematic factory cast iron manifolds that commonly crack on Jeep 4.0L engines.

Off-Road Ready: T304 stainless steel construction resists corrosion from mud, water crossings, and road salt that off-road vehicles frequently encounter.

Technical Specifications

Specification Details
Header Type Shorty / Direct Replacement
Inlet Diameter 1.50"
Outlet Diameter 2.125"
Material T304 Stainless Steel
Surface Finish Polished
Welding Process TIG Welded
Flange Type CNC Machined
Gasket Included Yes

Headers vs Stock Exhaust Manifolds

If you're debating between upgrading to headers or replacing with factory-style manifolds, here's what you need to know:

Feature Stock Manifolds AMVirtuo Headers
Crack Resistance Prone to cracking Excellent (stainless steel)
Exhaust Flow Restrictive casting Optimized for performance
Power Gains Stock output +10-15 HP/TQ
Corrosion Resistance Moderate Excellent
Weight Heavy cast iron Lighter

The Bottom Line: Factory cast iron manifolds on Jeep 4.0L engines are known to crack over time, leading to exhaust leaks and reduced performance. Upgrading to stainless steel headers improves exhaust flow, resolves the cracked manifold problem, and delivers long-lasting durability.

Installation Notes

Professional installation is recommended for optimal results. Here are important considerations for your Jeep 4.0 headers installation:

  • Direct Replacement: No modifications required. Uses factory mounting points and hardware locations.
  • Oxygen Sensor: Compatible with factory oxygen sensor locations.
  • Check Clearance: Verify clearance with aftermarket accessories.
  • Post-Installation Check: After installation, start the engine and listen for exhaust leaks.

Pro Tip: According to Jeep enthusiasts, replacing cracked manifolds with stainless steel headers is one of the best upgrades for 4.0L engines. The improved exhaust flow provides noticeable gains in throttle response and fuel economy. 

What's Included

  • 1x Exhaust Header Assembly
  • Mounting Gaskets
  • Installation Hardware

Frequently Asked Questions

1. Will these headers fit my 1998 Jeep Cherokee XJ?

Yes! These Jeep 4.0 performance headers are designed for 1991-1999 Jeep Cherokee XJ with the 4.0L inline-six engine. They are a direct bolt-on replacement for the factory exhaust manifold.

2. Do these headers require any modifications to install?

No modifications are required. These XJ exhaust manifold replacements use factory mounting points. However, older vehicles may need new exhaust bolts or gaskets due to corrosion on original hardware.

3. Will installing headers affect my Jeep's fuel economy?

These Jeep Wrangler exhaust manifold headers can improve engine efficiency, potentially offering modest fuel economy improvements during highway driving. Results vary based on driving style and vehicle condition.

4. Will these help with the common cracked manifold problem on Jeep 4.0L?

Yes, these stainless steel headers are designed to replace the problematic factory cast iron manifolds that commonly crack. The T304 stainless steel construction is more resistant to thermal stress and cracking. This is one of the most effective upgrades for solving chronic manifold issues on Jeep 4.0L engines.

5. Are these headers CARB-legal for California?

These headers may not have CARB exemption for street use in California. Check with local emissions regulations before installation. Off-road and racing use may have different requirements.

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