4.0L Exhaust?

[Fly-n-Hi]

I'm preparing my Wrangler for a 4" lift with 33's. I put a Brute Force Intake system and now looking for a high flow exhaust. I'm not looking for a loud sound, but I am looking for more HP. Any suggestions?

[LeadFoot]

HP isn't going to get back the lost power, gears are you best power mods.

[deadpedal]

I agree, regearing is the only reasonable way to get back that lost power. It's really important that you re-gear if you're gonna run bigger (33" or bigger) tires. The engine won't have a lot of grunt to give to spinning tires if the gearing is still running at stock ratios.

[TJMagoo]

Yeah, I agree. I regeard my TJ to 4.56 with 33x10.50's. Although now I wish I would've gone with 4.88's.

[TJ-RUBI]

after you regear, think about a Borla header/cat back, it will give you a good 10+%HP. TJ

[Fly-n-Hi]

Talk to me like I'm a 4 year old in reference to regearing please. I take it I should prepare to regear my vehicle. I assume this would be the transmission? 4.88 were mentioned, are there any other opinions on what gears?

[TJ-RUBI]

no problem, your after new ring and pinion gears in your axles, check out this site. 4wheelparts.com/4wheel/Tirel_gear_ratio.asp it should help you out. TJ

[Blupupher]

Nice chart Tj Rubi

[Penguinizi]

i definitly reccomend 4.88's. when i got my 33's i ended up breaking my rear axel and i happened to talk to someone who had a front and rear axel w/ 4.11's (i had 3.73's), so i snagged em and put em on...now my car still has a little trouble pushing these tires...i am going to upgrade ASAP.