[Jase_ELXR8]

What the best size primary pipe to get with pacemaker headers??? 1 5/8" or 1 3/4"???

 

[Martin]

Go the 1-3/4 if its 250Kw+, and the smaller size if less than that

 

[Jase_ELXR8]

thanks martin...

 

[strife]

If you scroll through some posts on ls1.com there is some good discussions on headers re 4-1 and 4-2-1