ls7 exhaust manifold for ls3
Thread Starter
Racer
Joined: Oct 2010
Posts: 279
Likes: 0
From: dix hills ny
ls7 exhaust manifold for ls3
there has been some chat about using the ls7 exhaust header on the ls3 for those who prefer not using headers. i briefly spoke with the guys at lg about a cam only mod specifically there executive cam, ud pulley ported tb and a good tune they had mentioned they have had gains using the ls7 header, now i never asked how much of a gain there actually was and they are closed until monday so i was hoping someone had the answer! i will be modding my 2011 gs vert m6. also can you use any year ls7 header and will it work with the stock ls3 headpipe and cat? thanks to those that can help.
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
there has been some chat about using the ls7 exhaust header on the ls3 for those who prefer not using headers. i briefly spoke with the guys at lg about a cam only mod specifically there executive cam, ud pulley ported tb and a good tune they had mentioned they have had gains using the ls7 header, now i never asked how much of a gain there actually was and they are closed until monday so i was hoping someone had the answer! i will be modding my 2011 gs vert m6. also can you use any year ls7 header and will it work with the stock ls3 headpipe and cat? thanks to those that can help.
Thread Starter
Racer
Joined: Oct 2010
Posts: 279
Likes: 0
From: dix hills ny
thats what i was afraid of! now im really only going to be comfortable with a very late or low mileage take off. are the 02 bungs in the same location? and is there any difference on the 2010 or 2011 ls7 manifolds.
Racer
Joined: Feb 2011
Posts: 468
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From: Phillips Ranch California
Its good for around 30 HP or so (LS3) if you run the entire system and get a tune.. I'm going this route (Manifolds/cats/mid pipe/mufflers) You don't need the O2 extensions either, simply unwind the tape in the loom to get more slack for the wires and then re tape.
FYI There is currently a set of Z06 manifolds,cats and mid pipe on EBAY for 350 plus shipping..
FYI There is currently a set of Z06 manifolds,cats and mid pipe on EBAY for 350 plus shipping..
Thread Starter
Racer
Joined: Oct 2010
Posts: 279
Likes: 0
From: dix hills ny
Its good for around 30 HP or so (LS3) if you run the entire system and get a tune.. I'm going this route (Manifolds/cats/mid pipe/mufflers) You don't need the O2 extensions either, simply unwind the tape in the loom to get more slack for the wires and then re tape.
FYI There is currently a set of Z06 manifolds,cats and mid pipe on EBAY for 350 plus shipping..
FYI There is currently a set of Z06 manifolds,cats and mid pipe on EBAY for 350 plus shipping..
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Thread Starter
Racer
Joined: Oct 2010
Posts: 279
Likes: 0
From: dix hills ny
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
www.casperselectronics.com
They make all sorts of electrical gizmos for GM and other brands. Mostly they do harness extensions, fan control mods and a bunch of stuff for the old Buick GN cars.
They make all sorts of electrical gizmos for GM and other brands. Mostly they do harness extensions, fan control mods and a bunch of stuff for the old Buick GN cars.
Melting Slicks
Joined: Sep 2008
Posts: 2,360
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From: San Jose California
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
You can probably sell your NPP mufflers for what a COMPLETE Z06 exhaust will cost you. Your only cost would be installation. Your profile doesn't say what trans you have but if you have an A6 you'll have problems getting the Z06 overaxle pipes to fit.
Last edited by haljensen; Mar 6, 2011 at 06:44 PM.
Burning Brakes
Joined: Aug 2007
Posts: 962
Likes: 0
From: SPRING HILL FL
Press the button and quiet as stock.....I had the manifolds jet coated, really made a differnce in the engine compartment.
Thread Starter
Racer
Joined: Oct 2010
Posts: 279
Likes: 0
From: dix hills ny
Thread Starter
Racer
Joined: Oct 2010
Posts: 279
Likes: 0
From: dix hills ny
why is that? doesnt the Z have a bimode set up simuler to the npp? i dont understand why the whole Z system could be worth less than just the npp mufflers
Thread Starter
Racer
Joined: Oct 2010
Posts: 279
Likes: 0
From: dix hills ny
Well I found a few systems out there now I need to see if I can keep my npp mufflers on the 3 inch Z pipes without it looking like a non oe weld job! I'm tring to keep everything looking oe.
Melting Slicks
Joined: Jun 2006
Posts: 2,164
Likes: 3
My Z06 exhaust system has been great on my LS2, I think I paid $600 for the whole thing manifolds to mufflers. This was shortly after people discovered you could do this mod, prior to that the whole Z06 setups were mostly given away. I've seen NPPs going for $800 so you really could do this for free.
I suggest you listen to a Z06 muffler mod before cutting into yours. I personally do not like the sound, especially so with a cam, sounds too much like a big truck. Lot's of guys love it though so its a personal choice.
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
Check the Parts for Sale section. Used NPP axleback for around $800, used Z06 manifolds,cats,mid pipe $350/Z06 axleback $350.
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,108
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
It's not like the whole world will be able to see the welds anyway.
Thread Starter
Racer
Joined: Oct 2010
Posts: 279
Likes: 0
From: dix hills ny
Keep the NPP and put a 3" to 2.5" reducer on the tail end of the Z06 H-pipe. It'll be hard to duplicate the weld, because good welders will have a better looking weld and poor welders have really crappy welds.
It's not like the whole world will be able to see the welds anyway.
It's not like the whole world will be able to see the welds anyway.