91-99 Grand Cherokee Wrangler XJ YJ TJ 4.0L Header Stainless Steel
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
4.0L Stainless Steel Header
Cast stainless steel header engineered for 4.0L inline-six engines, designed to improve exhaust flow and heat resistance. Built from premium stainless construction to resist corrosion and withstand engine bay temperatures. Direct bolt-on fitment eliminates guesswork on installation.
Key Features
- Stainless Steel Construction - Resists rust and corrosion better than mild steel, extends component life in harsh conditions
- Optimized Header Design - Larger diameter tubing reduces backpressure and promotes scavenging for the 4.0L platform
- Bolt-On Installation - Direct fit at factory mounting locations, no welding or custom fabrication required
Specs
- Material: Stainless Steel
- Configuration: Cast construction with optimized tube diameter
- Condition: New
Whats Included
- Header assembly only — fasteners not included
Frequently Asked Questions
Do I need to buy new bolts to install this?
You'll want to grab new header bolts separately — factory bolts often seize or strip. Use stainless or high-temp rated fasteners rated for header applications, and torque to your vehicle's service manual spec.
Can I reuse my old exhaust manifold gasket?
No. Always use a fresh gasket when bolting on a new header. Old gaskets compress and won't seal properly, which leads to leaks and heat loss. Pick up a header gasket kit before installation day.
Will this header work with my stock exhaust system?
Yes, it bolts directly to factory flanges. Your existing downpipe and exhaust will connect without modification. If you're upgrading the rest of the system later, this header is a solid first step.
Our History
For 26 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.