Why do I insist on bigger headers?
Exactly. 
Drifting
Joined: Feb 2010
Posts: 1,720
Likes: 38
From: Colorado
A lot of conventional wisdom in here. I've heard a few times, even spoke with a tuner about this, and he stated that even on a stock engine, the bigger headers lose nothing down low. Of course, the gains up top are negligible, on the order of ~8whp from 5000+, but it's 8 more than you get with 1 3/4" headers with no penalties elsewhere. Seems like a win/win scenario to me. For some reason, bigger is better in this scenario. In order of what he made the most power from least to most is LG Super Pros, then 1 7/8" Kooks, then 1 7/8" ARH. Some serious bang for the buck would be some el cheapo 1 3/4" headers, but if you're looking to blow 1500+ on them, just get the ARHs or wait for the Pfadts.
but you're right. But if his tuner wants to tune it with 6/8, then whatever.
