Hpipe Xpipe difference
Safety Car
Joined: Jan 2009
Posts: 4,681
Likes: 2
From: Mooresville (Race City USA) NC
One picture is worth a thousand words. So educate me, I assume the standard exhaust systems on the LS3, even the NPP exhaust option, comes with an "H"-pipe cross-over, and you have to go aftermarket to get an "X"-pipe, is this right? How much to change over, and what might it buy you, one or two horsepower? Any change to the exhaust sound on a more open system like the NPP with the valves held open 1/4 inch all the time?
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Safety Car
Joined: Jan 2009
Posts: 4,681
Likes: 2
From: Mooresville (Race City USA) NC
Thank you Bud for the excellent photos. I'm happy that my '09 LS3 Coupe exhaust apparently already has this feature. Unfortunately I've never been able to get under my Vette to view her, but from every photo I've seen, the C6 underside is nearly attractive as the topside, especially to a car nut/engineer like me.
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C6 of Year Finalist (performance mods) 2019
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From: Pottsboro; Sometimes Dallas Texas
St. Jude Donor '12
Thank you Bud for the excellent photos. I'm happy that my '09 LS3 Coupe exhaust apparently already has this feature. Unfortunately I've never been able to get under my Vette to view her, but from every photo I've seen, the C6 underside is nearly attractive as the topside, especially to a car nut/engineer like me.
If your planning to buy a take-off from someone, remember that 2012+ will NOT work on 2005-2011's....
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Joined: Mar 2005
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From: Austin Texas
Melting Slicks
Joined: Nov 2003
Posts: 2,155
Likes: 56
From: Escondido CA
I had a '09 LS3 w/NPP option. It did NOT have x-pipe. Even early production 2010 Z06 does NOT have factory installed x-pipe. That did not come until very late 2010 MY production on Z06 (oil cooler change as well).
If your planning to buy a take-off from someone, remember that 2012+ will NOT work on 2005-2011's....
If your planning to buy a take-off from someone, remember that 2012+ will NOT work on 2005-2011's....
i just thought all 09's came with it, but i guess not...another unique feature for the c6 csc's
Last edited by bud miller; Jan 9, 2013 at 10:38 AM.