Headers on a 3-valve

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03-27-2006, 08:45 PM

Nine Ball

LS1Tech Co-Founder

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Join Date: Nov 2001

Location: Houston, TX

Posts: 33,009

Headers on a 3-valve

How much improvement (track or dyno) have you guys seen with headers on a 3-valve GT?

Thanks,
Tony

03-28-2006, 12:35 AM

K Bo

Launching!

Join Date: Dec 2005

Location: Houston, TX

Posts: 252

it seems on a dyno typical gains are about ~25hp, not 100% sure about tq.

04-08-2006, 05:30 PM

WILWAXU

TECH Senior Member

Join Date: Nov 2001

Location: Sasebo, Japan

Posts: 14,384

How much room is under there? Will it be PITA like changing the headers on the 99-04 cars?

04-12-2006, 03:27 PM

383ss

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Join Date: Mar 2002

Location: Kansas City, KS

Posts: 2,894

from tests I've seen shorties are pretty much worthless. less than 5hp gain.

I'll be putting some longtubes or mac mid-length on the 05 soon, I hope. I'll update when I do.

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