10-14-2009, 08:08 PM
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| Senior Member
Join Date: Aug 2006 Location: Ontario, Canada
Posts: 814
Car: 1991 Trans Am GTA Engine: LSX (swapping) Transmission: 4L60E (swapping) Axle/Gears: 2.73 Posi 10 Bolt | '02 LS1 Manifolds - Asymetrical?
Well obviously the 2002 LS1 manifolds are different from left to right, but what I want to know is why they use a different pipe size left to right? I measured mine, one looks like a 2.5" pipe and the other side looks like 2.25". Is there a reason for this? I am going to be making a custom exhaust pretty much from the flanges back so what size pipe should I use on the flanges? Is 2.5" alright for both sides?
By the way, I just got my AN fittings and stainless braided line for my conversion fuel lines and I must say, this is my first time using AN fittings but I love them already! | | |
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'91 GTA WS6 | '99 LS1 / 4L60E |
 
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