- Joined
- December 22, 2021
- Messages
- 6,213
- Reaction score
- 4,737
- City, State
- Los Angeles, CA
- Year, Model & Trim Level
- 1998 XLT 4x4
hm same with these usually the small bolt ons it wont make a difference, if you do a cam swap then yes it may need tune maybe. but it doesnt seem you are? and oh i see. yeah something like that, if not 2.5 rither or imoAs far as the tune, if the ecu has enough wiggle room then cool. At least with the foxbodys, you would normally be ok until a cam swap...One thing though with where we live is the cats pose a big fire danger in summer. So being able to at least turn off the rear o2 would be nice. The cast manifolds...thumbs down. I've read a bunch of exhaust threads, and think with headers, 2.25 dual in/out should work.