Headers Question
Thread Starter
Melting Slicks
Joined: Jun 2009
Posts: 3,142
Likes: 1
From: SE Coast FL
Headers Question
Before I buy a set for the 07 LS2 (A6)....
Whats the difference/purpose between 1 7/8 and 1 3/4 applications? I even saw a set with 2" primaries.
Do I want coated or not coated?
(I heard coated will keep heat in the heads, true? Uncoated will raise underhood temps, true?) Which is the lesser of two evils?
I do want 'em catted.
Thanks
Whats the difference/purpose between 1 7/8 and 1 3/4 applications? I even saw a set with 2" primaries.
Do I want coated or not coated?
(I heard coated will keep heat in the heads, true? Uncoated will raise underhood temps, true?) Which is the lesser of two evils?
I do want 'em catted.
Thanks
Thread Starter
Melting Slicks
Joined: Jun 2009
Posts: 3,142
Likes: 1
From: SE Coast FL
Advanced
Joined: May 2008
Posts: 94
Likes: 1
From: Omaha NE
If you oversize the primaries you will loose power from incorrect scavenging through the bottom end and midrange. It may flow more on top end but will cost you more overall. I would go for the correct size for the exhaust port you have now unless you are going to use forced induction down the line.
Former Vendor
Joined: Feb 2007
Posts: 17,337
Likes: 39
From: Birmingham, AL www.hinsonsupercars.com 205-909-9402
Before I buy a set for the 07 LS2 (A6)....
Whats the difference/purpose between 1 7/8 and 1 3/4 applications? I even saw a set with 2" primaries.
Do I want coated or not coated?
(I heard coated will keep heat in the heads, true? Uncoated will raise underhood temps, true?) Which is the lesser of two evils?
I do want 'em catted.
Thanks
Whats the difference/purpose between 1 7/8 and 1 3/4 applications? I even saw a set with 2" primaries.
Do I want coated or not coated?
(I heard coated will keep heat in the heads, true? Uncoated will raise underhood temps, true?) Which is the lesser of two evils?
I do want 'em catted.
Thanks
Seth
Burning Brakes
Joined: Jun 2008
Posts: 1,214
Likes: 3
From: CA
Mine are made of 304 stainless as well with 1-3/4" primaries. I never have problems with unhood temps. I would go with 1-3/4" headers if i were you. If you're going to be digging into the engine or adding a power adder then go bigger.
