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03-16-2005, 01:03 PM
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#1
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Platinum Member
 Platinum Member
Join Date: Sep 2002
Location: Millersville,MD
Posts: 380
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Chevy 8.1 Headers
Anyone added headers to their 8.1 Allison combo?
__________________
"Mr. Speaker, the White House says NAFTA is creating new and exciting jobs. I did some research on those jobs: zipper trimmer, brassiere tender, jelly roller, bosom presser, chicken sexer, sanitary napkin specialist, and a pantyhose crotch-closer machine operator. That's what I call exciting jobs, Mr. Speaker." - Rep. James A. Traficant - May 13, 1997
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03-16-2005, 01:20 PM
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#2
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Registered
Join Date: Jan 2004
Location: Cleveland, OH
Posts: 553
88, Baja, force 370
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Re: Chevy 8.1 Headers
Yes. I just put Gibson headers on my '01.
I also added a K&N Air intake system, and a Hypertech powerprogrammer.
Mucho hp now. Big, noticable difference in power.
I think Gibson may be the only one who has headers for that truck. By the way, I have a set of used manifolds for sale.
I changed to the headers mainly because I had an exhaust leak, so I need to take the manifolds off in order to change the gaskets. Also, I just smahed my truck, so while the front clip was off, I figured I would change them.
I don't know how you are going to change them with the entire fron end together. Good luck!!!
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03-17-2005, 09:12 AM
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#3
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Deep Impact Boats
 VIP Member
Join Date: Jan 2003
Location: Ft. Lauderdale, FL
Posts: 1,539
Building boats for you
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Re: Chevy 8.1 Headers
I put a Banks system on my '00 454.. Good headers. They probably have a set up for your truck.. Not cheap, but they hold up. 1" flanges...
I also put the banks set up on my '94 454. Bigger results with that truck.
__________________
Tim Gallagher
Deep Impact Boats
General Manager
(305) 343-7990
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03-17-2005, 11:13 AM
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#4
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Platinum Member
Platinum Member
Join Date: Jul 2002
Location: milford, mi
Posts: 1,463
1984 Chris Cat
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Re: Chevy 8.1 Headers
Try T. Byrne motorsports.
Also on the Chevy avalanche fan website:chttp://www.chevyavalanchefanclub.com/cafcna/index.php/topic,31719.0.htmllub
Wannabe
PS NO SMART A$$ remarks on Avalanches
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03-17-2005, 12:33 PM
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#5
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Registered
Join Date: May 2003
Location: NY
Posts: 109
00' 29 ' Baja Outlaw
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Re: Chevy 8.1 Headers
Hell how can you afford headers after filling the tank so much...lol Just kidding I just traded my 02' with the 8.1 for an 05' with a D-Max becasue of the mpg I was only seeing 9-10 mpg without the boat.... The 285's didn't help much....
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03-17-2005, 12:45 PM
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#6
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Platinum Member
Platinum Member
Join Date: Sep 2002
Location: Millersville,MD
Posts: 380
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Re: Chevy 8.1 Headers
I had a Banks setup on my 460 Ford that worked real well, but they don't have a kit for the 8.1. I was hoping to find someone who has tried the new Stainless Works long tube headers.
http://www.stainlessworks.net/GM%20N...vy/GMC_Trucks_
__________________
"Mr. Speaker, the White House says NAFTA is creating new and exciting jobs. I did some research on those jobs: zipper trimmer, brassiere tender, jelly roller, bosom presser, chicken sexer, sanitary napkin specialist, and a pantyhose crotch-closer machine operator. That's what I call exciting jobs, Mr. Speaker." - Rep. James A. Traficant - May 13, 1997
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03-18-2005, 08:05 AM
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#7
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Registered
Join Date: Jan 2004
Location: Cleveland, OH
Posts: 553
88, Baja, force 370
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Re: Chevy 8.1 Headers
The Gibson headers I used aret he shorties. They are a direct bolt up from the stock manifolds. The tubes are not that long, and definately not equal length. I got mine from Stylin' Concepts. http://www.stylingconcepts.com/
Last edited by BajaIceBreaker; 08-20-2007 at 09:29 PM.
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