408 Header primary size... I’m torn
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Had a set, loved em. Heck the guy i sold them to never installed them and they may be for sale since he is going turbo.
Made this Y pipe for them with a 4" collector.
Made this Y pipe for them with a 4" collector.
Thread Starter
Staging Lane
Joined: Oct 2016
Posts: 84
Likes: 0
From: Lake Charles, LA
Thread Starter
Staging Lane
Joined: Oct 2016
Posts: 84
Likes: 0
From: Lake Charles, LA
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
You'll be happy with them. Lots of people swear you can go too big but i never really experience that. My car has had 1 5/8 Hedmans, 1 3/4 china stainless, 1 7/8 Hookers, and 2" TSP. The 1/5/8 were THE best in the midrange, but topend (5k+) suffered severely. All others midrange was about the same, and topend just got better and better. I had a properly sized converter along the way too though.
Thread Starter
Staging Lane
Joined: Oct 2016
Posts: 84
Likes: 0
From: Lake Charles, LA
You'll be happy with them. Lots of people swear you can go too big but i never really experience that. My car has had 1 5/8 Hedmans, 1 3/4 china stainless, 1 7/8 Hookers, and 2" TSP. The 1/5/8 were THE best in the midrange, but topend (5k+) suffered severely. All others midrange was about the same, and topend just got better and better. I had a properly sized converter along the way too though.
TCI manual valve body with brake (4L80E)
TCI 4L80E race rebuild kit
TCI Diablo shifter
FTI 3600 stall with lockup
BTR CNC’d GMPP LS3 heads
BTR rockers with trunnion upgrade
BRP LS swap engine/trans mount and crossmember
Jegs 15x10 and 17x4.5 wheels
MT 275/60-15 ET Streets
MT 28x6x17 S/R radials
Custom 9” with aluminum center section, Yukon locker, Yukon 4.11’s
Caltracks split mono leafs
Caltracks traction package
I’ve got a few more things to buy, but mostly puddly crap. The last BIG purchase will be the 408 rotating assembly. I think it goes without saying that I’m F’n stoked to get all my parts
