True Dual Exhaust?

fishhook5969 · February 18, 2010

I want to put an exhaust system on my truck with split dual tips in the rear, but I would also like it to be true dual with a crossover. Is there anyone that makes a kit with a crossover for the 09 Silvy? (I also have a CrewCab, 4WD, 5.3 Flex) I have scoured over most of the exhaust mfg. sites and didn't find anything that wasn't single in/ dual out. I also tried searching this forum and didn't find any specific answers. I apologize if this has already been discussed ad nauseum and I missed it. Thanks for the help!

Jubei69 · February 18, 2010

You can do what hockeypro did on his setup, then you can decide if you need a x pipe or h pipe to "balance out/equalize" the cyclinder banks according to Magnaflow and Flowmaster. The kits I listed were actually for Corvettes and GTO's, I assumed they would have the same kits for GMC/Chevy trucks; but there isn't

nickvrebel · February 18, 2010

there is no such kit. The reason you could see if you would look under your truck. Your exhaust flows from the motor to manifolds -> Catalytic converters to a "Y" junction (hence the name "Y pipe") then there is a flange - this flange separates the Y pipe from the "cat back" portion of the exhaust. The Y pipe is one welded piece and would have to be hacked up to eliminate the Y junction.

now to my question for you: why would you want a "true dual" exhaust??? if you are using a single in dual out muffler then the factory has essentially already included the "built in" X pipe.

hockeypro1411 · February 18, 2010

Take it to an exhaust shop and see what they can do for you. They typically know what works the best from their experience. Pick out a muffler that you think sounds nice, and go from there.

I don't have an X or an H or any crossover for that matter. Mine both run directly from the manifold to the mufflers, and then out to the back.

nickvrebel · February 18, 2010

Take it to an exhaust shop and see what they can do for you. They typically know what works the best from their experience. Pick out a muffler that you think sounds nice, and go from there.

I don't have an X or an H or any crossover for that matter. Mine both run directly from the manifold to the mufflers, and then out to the back.

your truck appears to also be an HD, I don't see any Duramax badgng so is it safe to assume you have the 6.0L?

if so your truck came from the factory with a "Y" pipe that does not connect and it had a dual inlet/ single outlet muffler in stock form, much easier to do this if desired.

I still don't see any benefit of going through the trouble to split the exhaust only to bring it back together again using a H or X pipe. The only thing you'll accomplish is adding more weight and having to buy another muffler.

Jubei69 · February 18, 2010

I still don't see any benefit of going through the trouble to split the exhaust only to bring it back together again using a H or X pipe. The only thing you'll accomplish is adding more weight and having to buy another muffler.

+1

lol so you believe the H pipe and X pipes are gimmicks from the exhaust manufacturers to get a little extra coin from the masses...

hockeypro1411 · February 18, 2010

Take it to an exhaust shop and see what they can do for you. They typically know what works the best from their experience. Pick out a muffler that you think sounds nice, and go from there.

I don't have an X or an H or any crossover for that matter. Mine both run directly from the manifold to the mufflers, and then out to the back.

your truck appears to also be an HD, I don't see any Duramax badgng so is it safe to assume you have the 6.0L? YES.

if so your truck came from the factory with a "Y" pipe that does not connect and it had a dual inlet/ single outlet muffler in stock form, much easier to do this if desired. DO WHAT?

I still don't see any benefit of going through the trouble to split the exhaust only to bring it back together again using a H or X pipe. IT'S BEEN SAID THAT IT CAN HELP BALANCE THE EXHAUST PRESSURES. The only thing you'll accomplish is adding more weight and having to buy another muffler. WHO NEEDS MUFFLERS?

kdog55 · February 19, 2010

My 05 6.0L came with true duals through 2 cats and into 1 muffler, dual inlet/dual outlet, then came together into 1 tailpipe right after the muffler. I have no idea why, but I trust their engineers. Anyway, before I put on my MBRP true duals, I did a bunch of reading on things like the x-pipe, H-pipe, and different length tips, all of which change the sound and the crossover pipes did have a purpose. I cannot find the thread anymore, but it is not as simple as just extra weight/cost. FWIW, I am still having a tough time getting used to hearing the dual exhaust. Not because it is louder(it replaced a flowmaster big block series single muffler-dual in/dual out to stock y-tailpipe), but since I am used to hearing everything come out of 1 pipe, the duals sound to me almost like a miss in the engine, I guess because the drivers side bank is all I really hear. I wonder if an x-pipe would help this also?