tt3000gt

Right now I have B&B mufflers, if I were to get a X-pipe would there be a increase in sound?

I know the x-pipe doesn't have any sound resonators or cats on it, so I didn't think there would be an increase in sound.

Any opinions would be great!

pedalpusher

I have a 2006 A6 that has an H-pipe from the factory. I added B&B Route 66 axle back system using the stock H-pipe. Then removed the H-pipe and installed an X-pipe from a 2008 Vette. Sound, and the hated drone, stayed the same. No change. Waste of time and money.

debo

I think you would probably notice it more at WOT than just driving around town.

sxeC7

The X-pipe basically balances the exhaust flow, but doesn't do much for sound. It must be worth something though or GM wouldn't have made it standard starting in '08

tt3000gt

Ok so it seems that in terms of sound the x-pipe is going to make very minimal difference

GaryW

Talking of wasting money... I didn't know the '08 already had an X-pipe, so bought the full Stinger cat-back rather than just the mufflers - only realised when I picked up the old H-pipe...and discovered it was an X-pipe! D'oh!

C6400hp

It will help eliminate some of the burble on decel but the sound will not change much if any.

j_digi454

but I like the burble from my newly installed NPP Exhaust so I don't intend on installing an X pipe in place of my H pipe.

John Mclain

I had originally thought the same thing, but after looking closely at the Corsa H pipe and the factory H pipe there is a difference.

At the point the drivers and passenger pipes meet to form the H the factory H pipe seems to join under the weld. ( 2 into 1 then back out to 2 ) I think this is where you get the gases swirling together and a lot of popping with the factory pipe..

With the Corsa H Pipe where the L and R sides meet to form the H there is a distinct separation the pipes don't merge into one.

Unless of course the factory H pipe is dented in flat - butted side to side then welded. It's hard to be 100% positive without taking out the Reciprocating Saw.

GotVett?

and as far as mine is concerned, there is still plenty of burble, so I don't know how much is really eliminated.

ErnieD

I have only used "x-pipes" that have a formed sheet metal "box" for the x-area rather than the siamesed pipe variety such as the corsa or borla. On my C5 I used a Bassani x-pipe and on my C6 it was a West Coast Corvette x-pipe. In both cases, the x-pipe actually lowered the exhaust sound level -- not a huge amount, but noticeable on both cars. The exhaust note was also smoother on both cars with the x-pipes installed.

It's only a guess, but I think the sheet metal box type of x-pipe allows more volume for exhaust gas expansion which may result in slightly lower pulse velocity through the mufflers.

MADinAK

The "burble" is still there. My Corsa X-Pipe mostly eliminated any popping but it burbles quite nicely.

HorsePower Junkie

Anyone have true dual exhaust on their C6 without a "X" or without an "H" crossover pipe? And is it a deeper "old school sound" ??



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jimbob8915

I installed an X-pipe to try to even out the exhaust pulses to try to hide my cam.

jimijam

That's what an H-pipe does too. It just does it differently. Power increases are at different rpms for each.