Reviews for Crown Automotive RT36001 Stainless Steel Header Kit for 91-99 Jeep Wrangler YJ & TJ; 91-99 Cherokee XJ & Comanche MJ and 93-98 Grand Cherokee ZJ with 4.0L Engine

High quality header and gasket kit. Seems to be a clone of the Banks Revolver style header at a lower price. The build quality seems sturdy and the welds are far superior to stock OEM, however are only exterior welds. There is a tube that sticks out further than the others, providing the scavenging torque tube effect supposedly, but I didn't notice much of a power increase.

Important note regarding fitment! You almost certainly will have to shave a bit off of the intake manifold to fit it in with the new header on the engine block. Exhaust flanges 1 and 6 are a hair's width too thick for the intake manifold to clear smoothly. Take a dremel or a file and shave down the manufacturing seam on the intake manifold where it passes exhaust flanges 1 and 6 and it will fit snugly. Before bolting everything down be sure to check that the shaved intake manifold is sitting flush against the block with gasket, or you will have a vacuum leak that can cause your RPMs to be very high on initial start up.

Was not a perfect fit. Had to shave off a little bit on the 1 and 6 flange for the intake manifold to fit. Otherwise it looks great!

Was not a perfect fit. Had to shave off a little bit on the 6 flange for the intake manifold to fit. Otherwise it looks great!

Have to return the header. One of the pipes is sticking out too far to properly re install the intake manifold on my '99 XJ. Really upsetting because it mounts to the engine block great, just cant get the intake manifold on correctly. I even tried grinding down the intake manifold where is makes contact with the exhaust pipe however id end up cutting into the intake itself in order to make this fit. Really bummed

First one I got cracked after 2 months. Warranty took 7 months to come. Warranty header DID NOT clear the intake manifold in between plenum 1 and 2 as well as 5 and 6. Do not buy!