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Discussion Starter #1 (Edited)
Hello, I am looking to do true duals on my truck. I am currently looking at doing from the manifolds back. Yes, I know should put long tube headers on, but dont have the money right now for that. I am looking at either 2.5 or 3 inch tubing. It will have cherry bomb glass packs and no cat. My question, is where should I locate the mufflers, so I dont have any kind of funny tones with them. Also, I plan to exit it on both sides at the factory angle, if that would not cause any problems. Want it to look half ax stock. Thank you. Forgot to mention, I will be having a custom tune done to the truck for the cat deletion.
 

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Hi Mark - I'm not an exhaust expert (sorry), but it might be helpful for those that are if you include your vehicle information in your post or signature.

Good luck with your mod!.....and I'm sure someone will respond soon who will have some great advice for you.
 

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Discussion Starter #3
Sorry about that, it is the 2007 Sierra 1500. I was looking at the stock pipe on my Silverado and it is a 3" pipe, probably just go 3 on the new stuff to.
 

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Discussion Starter #4
Here were some pics of the silverado I took as reference for the sierra, since it isnt currently here. What would be the best way to go about dealing with the trans brace with all the cables on the driver side, also with the gas tank, what is the best way to route around it? Thank you for all the help. Sorry if I uploaded the photos wrong.
 

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Unless your building a drag truck, I would keep the cats. The cats on these trucks flow very well for a street truck. I would cut the exhaust off just in front of the factory "Y" pipe and run the dual exhaust from there. Also don't go over 2.5", anything bigger is a waste and will kill your bottom end torque.
 

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^^^^^x2! and you'll HAVE to out your glass packs pretty much where your stock muffler is just cus your fuel tank prevents you from going equal length and identical from side to side
 

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Discussion Starter #7
Thats what I was also thinking. I was looking, maybe keep the cats, find a cat back set up. Cut the wye pipe and use the cat back system, modified to work wit hthe glass packs.
 

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Hey man i have 2.5 inch exhaust pipe ran true dualed going out the sides and i just installed a flowmaster super 40 series true dualed and it sound's good not too loud. I love the way it sound's it's got a deep tone too it compared to the way my true dual straight's sounded and it also hurt my MPG and also hurt my HP and Torque along with back pressure lag. I can feel that i got all of that back plus more and will be installing a x pipe soon too give me some more HP and Torque and it also let's the exhaust flow more evenly that's my plan's so far man..
 

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Hey man i have 2.5 inch exhaust pipe ran true dualed going out the sides and i just installed a flowmaster super 40 series true dualed and it sound's good not too loud. I love the way it sound's it's got a deep tone too it compared to the way my true dual straight's sounded and it also hurt my MPG and also hurt my HP and Torque along with back pressure lag. I can feel that i got all of that back plus more and will be installing a x pipe soon too give me some more HP and Torque and it also let's the exhaust flow more evenly that's my plan's so far man..

i know its not the best for power and mpgs, but i love the way a H-pipe sounds
 

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Just an idea but instead of going through the hassle of running extra pipe and finding places for extra mufflers you could always go with a single exit exhaust much like magnaflow or banks offers. You will follow the stock path, use the same 3in pipe, and just have a muffler that flows much better than stock.

Only reason I would buy the whole catback kit is because banks or magnaflow comes with stainless and mandrel bent pipes. But if you're trying to save a dollar or two I'm sure you could just cut out the stock muffler out and weld in a magnaflow or banks muffler. I have no numbers but I'd be willing to bet that 3in mandrel bent pipes with a better flowing muffler will perform just as good as a true dual exhaust.
 

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Discussion Starter #11
I are ready bought the glasspacks. They were 15 a piece. I may just hold on to em a little longer and maybe put em on the next project.
 

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if you want a true dual set up with an X-pipe, you could go with a magnaflow muffler. It gives you a 2 for 1 deal, and may save you a few $$$
 

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Yeah man i found a Magnaflow true x pipe from www.autoanything.com for $75 bucks with free shipping and is half the price for what other site's want including magnaflow's site it's like $140 bucks just my $0.02 cents
 
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