Installed a cheap set of headers on the '98 4.0. removed the cat and straight piped to a cherry bomb muffler. apparently i didn't get clean enough at the gasket because i have a small leak that is annoying the heck outta me. I plan on taking it apart over the weekend and wanted input on is it worth putting a 99 or later intake on. I've read they perform better with their visibly smoother direction of flow. I found one at the pull a part for $40. Does anyone have anything to advise? leaning towards doing it, but thought i'd throw it out to get some feedback.
Is it worth putting a 99 or newer intake manifold on my 98?
- Thread starter 98 Black Bart
- Start date
When I used to own an XJ a long time ago, this used to be something people discussed all the time on the XJ forums. However, I did the research and came to find that their were no real gains to be had, it was all just a bunch of hype. Supposedly the reason they changed the intake manifold if I remember correctly, is because they changed the cylinder head intake ports slightly on the later models, and the newer style intake manifold runners were a result of that.
There is no power to be gained, and this can be seen from looking at the hp numbers on a 98 TJ vs a 2001 for instance.
Maybe someone can prove me wrong with actual before-and-after dynos, but the research I did led me to the conclusion that there was nothing to be gained.
There is no power to be gained, and this can be seen from looking at the hp numbers on a 98 TJ vs a 2001 for instance.
Maybe someone can prove me wrong with actual before-and-after dynos, but the research I did led me to the conclusion that there was nothing to be gained.
