Header size for supercharged
Drifting
Joined: Apr 2015
Posts: 1,276
Likes: 317
I like the ARH over the Kooks because of the longer primaries. On a full boogie build for a m7, I would use 2". My a8 is going to put down north of 800rw and I am using 1-7/8 primary's. It does no good to pick up 10hp at 6krpm and loose 10ftlbs at 5k and below when you have an auto with a stock convertor 
John
John
Last edited by JHEBERT; Apr 29, 2017 at 08:12 AM.
Team Owner
Joined: Jan 2007
Posts: 29,063
Likes: 1,839
From: cookeville tennessee
But unless you are going to be pushing 1200 plus rwhp I would think the 1 7/8 TUBES IN THE HEADERS WILL DO YOU GOOD MAN. Robert
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Former Vendor
Joined: Mar 2003
Posts: 18,666
Likes: 395
From: Tampa FL
St. Jude Donor '07-'08-'09-'10-'11-'12'-'13-'14-'15
We run TSP 2" WO cats. I may run 1 7/8 if not pushing more boost but 2" was our choice for 2.5 psi increase with ported blower. Full disclosure, you can see from the previous runs that we did lose some torque before changing to the griptech 2.30 upper and ported blower. Time for dual meth and 700+whp on stock blower
Last edited by Cajun @ Edgyvette; May 2, 2017 at 02:34 PM.