Ok I've been reading about how people are putting headers on there jeep but is it really worth it. I've got a 93 XJ with a 4.0L. Yes my stock manifold is cracked and I'd like to have some valued opinions about this. Along with having the cracked manifold on it I was given a stock manifold from a 97 XJ from a friend. I'm wondering what is better and if the header is the better what size primaries are best, I've seen 1.5 and 1''5/8.Thanks in advance.

 

Yes,a header is a very good upgrade!

 

get the flex exhaust manifold, less prone to crack in the future

 

Doesn't antone else have an opinion about this matter?

 

Get the header it is less restrictive wich means better heat disapation so it will be way less prone to cracking.And its a cool upgrade especialy if you get polished stainless steele.

 

i agree mine is awesome

 

i put on the ehaust manifold with the flex hose to prevent cracking got it off quadratec its actually pretty nice i dont see it being very restrictive i have no experience with an actual header on the 4.0 but they usually do help

 

so what size header is the best or doesn't it matter.