Thread: DIY Dual Exhuast

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Hey everyone!

I plan on installing a true dual exhaust system on my truck this summer and would like to run a few things by you guys/gals before I get started.

No after market company makes a true dual exhaust system for my 2006 Nissan Titan (5.6L V8) so I'm making my own via a pipe kit I have discovered on Summit's website.

The kit has an x-pipe and optional headers dumps already installed (stainless pipe). I'm keeping the pipe size at the stock 2.5in as I want to retain the truck's low end torque as much as possible. I decided to go with a dual set up so she can breathe a little better. See link. Pypes Performance Exhaust XVX10 - Pypes X-Change X-Pipes - Overview - SummitRacing.com

So my question to yall is, if Magnaflow offers kits that use a single muffler sized at 5x8x18 to handle all 8 cylinders, should I run a smaller muffler (each muffler would handle 4 cylinders worth of exhaust in the kit I'm looking at) as not too loose too much exhaust back pressure or say forget it and run two 5x8x18 Magnaflow mufflers?

I cannot afford the exhaust kits that are available for my truck in the after market (they start at around $650) so I figured Id weld in my own. Not to mention the smooth bends and "straight through" exhaust flow look of this kit looks superior to anything I have seen yet.

Thanks everyone!

I could be wrong but if you want to retain all the low end it might be best to stay with a set that you all ready have. Try and upgrade what you have. True dauls may suit you better if you are looking for top end. Either way on a heavily computerized engine you will likely have to reprogram some things.

Thanks for the reply BigTruckDriver

I currently have the stock exhaust system on my truck. A good system, but things can always be made a little better.

A good friend of mine is a Nissan Tech and he has the tools to re-flash the computer after any modifications are made. There is a code you can send to the truck's ECU that brings everything back to factory settings (before the truck leaves the factory) and the ECU re-learns the truck and treats any modifications like they came stock on the truck. Essentially making the best out of any modifications you make

No ideas on the muffler sizing?

Muffler sizing doesn't mean much.
Its how they're made and what kind of restrictions are built into them.

That is true. I'm just going to run two 5x8x18 mufflers and listen to those horses. Thanks guys.