Exhaust Headers Polished Stainless Steel for 1991-1999 Jeep Wrangler Cherokee Grand Cherokee YJ TJ XJ ZJ 4.0L
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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.
At AMVirtuo, we want every customer to feel confident when purchasing from us. If something isn’t right, our team will always do our best to help resolve the issue quickly and fairly.
Please review the policy below for details on returns, cancellations, and refunds.
30-Day Return Window
We offer a 30-day return window from the date your order is delivered.
If you are not completely satisfied with your purchase, you may request a return within this period, provided the product meets the return conditions listed below.
Order Cancellation
Orders may be canceled within 24 hours of purchase.
If your cancellation request is received within this timeframe, we will issue a full refund. Refunds are typically processed within 24 hours after confirmation.
If the order has already been processed or shipped after the 24-hour window, cancellation may no longer be possible. In this case, the order may be returned after delivery following our return policy.
Return Conditions
· To be eligible for a return, items must meet the following requirements:
· The return request must be made within 30 days of delivery
· The item must be unused and in new condition
· The product must be returned in its original packaging
· All included hardware, accessories, and components must be returned
Please ensure that returned items are securely packaged. Items damaged during return shipping due to improper packaging may not be eligible for a refund.
Please ensure that returned items are securely packaged. Items damaged during return shipping due to improper packaging may not be eligible for a refund.
Returns Due to Product Quality Issues
If a return is requested due to a product defect or quality issue, please get in touch with our support team and provide:
Your order number
Photos or videos showing the issue
Once our team confirms the issue, AMVirtuo will cover the return shipping cost.
After the returned item is received and inspected, a full refund will be issued. Refunds are typically processed within 48–72 hours after inspection.
Returns for Other Reasons
If a return is requested for reasons such as:
Ordered the wrong product
No longer needed
Changed your mind
Refused delivery
The customer will be responsible for the return shipping cost.
Once the returned item arrives at our warehouse and passes inspection, the refund will be issued. Please allow up to 2 weeks for the return to be processed and the refund to appear.
Installation and Fitment Responsibility
Automotive performance parts, including exhaust headers and engine components, may require professional installation and proper vehicle compatibility verification.
Customers are responsible for ensuring the product is compatible with their vehicle before purchasing.
Products that have been installed, used, or modified may not be eligible for return.
Non-Returnable Items
For safety and quality reasons, the following items may not be eligible for return:
Products that show signs of installation or use
Products that are damaged during installation
Items returned without original packaging or components
Refund Processing
All refunds will be issued to the original payment method used at checkout.
Processing time may vary depending on your payment provider, but refunds are typically completed within a few business days after approval.
How to Start a Return
To request a return, please contact our support team:
Please include:
Your order number
The reason for the return
Photos or videos if applicable
Our support team will guide you through the return process and provide the necessary return instructions.
Our Commitment
At AMVirtuo, we are committed to providing reliable performance parts and excellent customer service.
If you ever have questions or concerns about your order, please reach out to us. Our team will always do our best to help and make things right.