Power up my jeep
 

I just bought a 1994 HO cherokee with the 4.0 straight 6 and I was wondering if there are any simple and cheap ways to give it more power and possibly more gas mileage. Any help would be appreciated! Thanks

exhaust for sure i put a cherry bomb and new tail pipe and it sounds awsome proforms amazing and gave me like 2 mpg more plus a custom cold air intake witch gave like 1 mpg

Bored TB new exhaust set up different injectors