I have an aftermarket stainless steel exhaust header for a Jeep YJ with the 4.0 litre motor. It's a very well made & it has no cracks or damage. It was on the engine for a number of years, until the head gasket started to go & the Jeep was subsequently parked & is now being parted. The header has lost its original stainless sheen for sure due to use & age but it's still very solid and the rest of the exhaust pipe from the collector pipe down is stainless steel tubing as well. This header fits all the 1991-1995 YJ's for sure. It may work on a Cherokee & possibly for a TJ up to 1999 only. Definitely not 2000 & up models which have a different cylinder head. I also have an excellent condition twin cat system removed from a 2003 4.0 litre TJ. $150