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Old 12-11-2012, 01:32 PM   #1
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03 v6 H pipe exhaust questions

I'm looking to get an exhaust system but I'm kinda foggy to understanding everything and I want to get and I'm hoping to get am Hpipe or at least divorced duals.. I saw this 2 1/2 H cat back pipe it says I can put a GTs cats behind it but would I just be able to get the shop to adapt my cats to it? Or would that be screwing things up??
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Old 12-11-2012, 01:33 PM   #2
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i'm confused by half of what you asked....but the easiest thing to do is to call around shops and get quotes...also check out our search feature...we have a lot of exhaust threads that would probably answer your questions as well
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Old 12-11-2012, 01:33 PM   #3
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http://www.latemodelrestoration.com/...ck-Adapter-Kit
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Old 12-11-2012, 01:36 PM   #4
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yeah that midpipe will let you take any GT catback and bolt it up (you'll need to add hangers of course for the passenger side)..a shop will have to fab it up to your car though...simple job though for a shop
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Old 12-11-2012, 01:42 PM   #5
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Quote:
Originally Posted by 1slosix
yeah that midpipe will let you take any GT catback and bolt it up (you'll need to add hangers of course for the passenger side)..a shop will have to fab it up to your car though...simple job though for a shop
Kool also I was wondering if I don't get gt cats would I be able to use my v6 cats? Orr r they to small?
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Old 12-11-2012, 01:44 PM   #6
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what a shop will end up doing is cut the y pipe off just after the cats and weld up that h-pipe...for best fitment you'd want to have the catback installed at the same time so they can decide where to weld it at. that way the catback will sit right.
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Old 12-13-2012, 12:01 PM   #7
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Quote:
Originally Posted by 1slosix
what a shop will end up doing is cut the y pipe off just after the cats and weld up that h-pipe...for best fitment you'd want to have the catback installed at the same time so they can decide where to weld it at. that way the catback will sit right.
I see and if I go with dual exhaust would it mess up the back pressure?
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Old 12-13-2012, 01:57 PM   #8
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no...in fact back pressure is really just a common misconception for our cars...exhaust velocity is all you'd need to worry about. you're fine with dual exhaust or single they will both work fine...as long as you don't go to some crazy tubing size like 3".
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Old 12-13-2012, 04:35 PM   #9
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Quote:
Originally Posted by 1slosix
no...in fact back pressure is really just a common misconception for our cars...exhaust velocity is all you'd need to worry about. you're fine with dual exhaust or single they will both work fine...as long as you don't go to some crazy tubing size like 3".
Thanks! Lol
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Old 12-13-2012, 07:03 PM   #10
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Yeah, What they said. Simply put, the cats are before the mid-pipe (H-Pipe).

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Old 12-14-2012, 12:17 AM   #11
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Yeah, What they said. Simply put, the cats are before the mid-pipe (H-Pipe).
Makes total sense now! Ha if I got the hpipe after the cats would that effect performance at all? Or sound different?
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Old 12-14-2012, 01:18 AM   #12
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just sound...our sixxers are even firing engines so midpipes really don't do much for performance..yeah it can effect where the powerband sits but not by much
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Old 12-14-2012, 07:09 AM   #13
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let me explain this to you from experience. i just got my h pipe put on yesterday before that i was running divorced duals (no mid pipe). as soon as they put that sucker in i noticed a huge difference in pick up as well as sound. it was slightly quieter than before but way faster than before. The sound for x or h dont really make a difference it's all in the mufflers if you ask me!

---------- Post added at 07:09 AM ---------- Previous post was at 07:07 AM ----------

Quote:
Originally Posted by mattthegreat210 View Post

Kool also I was wondering if I don't get gt cats would I be able to use my v6 cats? Orr r they to small?
I'd reccommend AT Automotive Matt, as we live in the same city haha. i got my cats taken off and the flowmaster 40 dual exhaust w/ h pipe and some nice chrome tips all for $400
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Old 12-14-2012, 02:31 PM   #14
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Crowned most of that pickup is in your head sadly. The butt dyno can really throw your mind for a loop that's half the fun though right.
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Old 12-14-2012, 06:49 PM   #15
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Prolly noticed a power and shift is all
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Old 12-15-2012, 01:27 AM   #16
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Crowned most of that pickup is in your head sadly. The butt dyno can really throw your mind for a loop that's half the fun though right.
nah i think you know when your car has a bit more umph
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Old 12-15-2012, 10:24 PM   #17
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You can keep your V6 cats with a new divorced dual system or catback.

---------- Post added at 11:24 PM ---------- Previous post was at 11:21 PM ----------

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nah i think you know when your car has a bit more umph
FYI:
My dyno showed 10HP increase with LT headers and MAC ProChamber. ProChamber mid-pipe can provide some kind of performance increase.
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Old 12-15-2012, 11:24 PM   #18
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i'm gonna say that increase was 98% LTs
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