So you want to squeeze as much horsepower and increase performance for your 4.0 in your XJ or MJ? A bored throttle body is an easy upgrade to do just that.
- There are various sizes of bored throttle bodies ranging from 60mm all the way up to 68mm!
- HO 4.0Ls factory throttle bodys are 58mm. Renix is 52mm.
- The most commonly used size is the 62mm. If your 4.0L is stroked, you may need something bigger than 62mm depending on your intake manifold bore.
Do It Yourself Links
- go.jeep-xj.info/HowtoTBboring.htm by Marcus
Where to Buy Bored Throttle Bodies