Our products are designed based on OEM specifications and are suitable for unmodified vehicles. If your vehicle has been modified, compatibility or installation cannot be guaranteed. We recommend confirming your vehicle's setup or consulting our customer service team before purchase. We're here to help!
Description
Exhaust Headers For 1987-1990 Jeep Wrangler 4.2L 6 Cyl AMC 258 Engines
Upgrade your Jeep with this high-performance AMC 258 header, designed for 1987–1990 Jeep Wrangler 4.2L 6-cylinder engines. Crafted from polished stainless steel with mandrel-bent 1.50" tubes and a 2.00" collector, it improves exhaust flow, boosts horsepower, and enhances engine sound. Direct bolt-on fit—no modifications needed.
Fitment:
1987-1990 Jeep Wrangler 4.2L 6 Cyl AMC 258
Specifications:
Brand Name: FLASHARK
Certificate: ISO9001:2000
Application: Automobile Exhaust Header
Material: Stainless Steel
Surface: Mirror Polish
Tube Diameter: 1.50"
Collector Diameter: 2.00"
Exhaust Header VS Manifold, which is the better choice?
The structural differences between exhaust headers and manifolds mainly lie in material and design. Exhaust headers are made of lighter, thinner steel, while manifolds are typically built from thick cast iron. Headers are also longer, and because each engine cylinder is connected to its own individual tube, they help reduce back pressure—unlike manifolds, which often restrict exhaust flow and decrease performance.
By minimizing back pressure, exhaust headers improve engine efficiency, allowing exhaust gases to exit more freely. This results in better performance, increased horsepower, and enhanced sound—making headers the better choice over traditional manifolds, especially for engines like the AMC 258 4.2L 6-cylinder found in the 1987–1990 Jeep Wrangler.
Upgrading or replacing your exhaust header is essential for those looking to boost both engine output and exhaust tone. Whether you're on the street or off the trail, FLASHARK offers a range of performance headers to meet your needs. Our designs are direct bolt-on, requiring no modifications, making installation quick and convenient.
SOME ITEMS YOU MAY ALSO LIKE
In addition to purchasing this product, Flashark highly recommends that you purchase Flashark and Spelab's new collaborative product, the silicone coolant hose kit; to replace the stock rubber coolant hose in your car's cooling system.
Are silicone coolant hoses better? Coolant hoses transport the coolant—a mixture of water and antifreeze—from the engine to the radiator and back. The coolant absorbs heat from the engine block and heads and then releases this heat through the radiator, where airflow dissipates it away from the vehicle. This continuous flow is crucial for preventing engine overheating, which can lead to severe damage or failure.
Customer Reviews
Based on 2 reviews
100%
(2)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
P
Well the package appears to be well done and is intact with no visible damage. It has not been unpacked and my mechanic will not be able to install until late April. I have been back on the website to look for a cat back kit have not found one. I had hoped to to find one with your company and it turn hope that under the circumstances you will allow time for to open and examine and the install. I ordered ahead of install due to the tarriff induced pricing to come. Part #2 will be forthcoming.
D
Have not installed but looks to be good quality, super thick flanges and all the hardware/ gaskets needed , and stainless steel pipes . Nice kit .
