Someday I plan on a whole new exhaust setup, but for now Im in the planning stages.
Ive had a few setup running through my head and have one Im curious about.

Right now I have a Magnaflow SI/DO muffler setup on my pickup, just from the stock Y pipe back. And I know you can reverse a Maggy muffler so I thought of this...

Long tubes will be going on, most likely Maggy HiFlow Cats, and from there back I was thinking of running the left and righ side into the dual part of the muffler, with a single pipe exiting.

Maybe just because its more complicated to fab up, but why dont I seem to see many DI/SO setups. Is there a reason (power wise) or anything. Seems to me like the DI/SO muffler would just act as a Y pipe to a single exhaust system, no?

Im just curious if there is a good reason I dont see many setups like this or not. Im no exhaust expert so I wondered if maybe this type of setup just didnt make good power or something...

Looking for most power first, with good sound a close second.

Anyone have any insight on this? Thanks...

 

To add....Im just in the thinking up ideas/planning stage right now since Im not sure when I will get around to doing this.

I wouldnt mind using the muffler I have now since, well, I already have it. If there is a *perfect* setup that works for the most power though, that involves ditching the muffler I have now though, let me hear about it too...

 

DI/SO isn't too popular because a majority of people with dual pipes would rather have dual tips.

LTs with 2.5" dual pipes going into a dual 2.5" to 3" out muffler would be a great setup for torque. GMs HD trucks from 2001 - 2006 were similar to this, and they maintain very good torque numbers.

 

Kinda figured that too...if someone is going to do a custom exhaust job they want duals.


I was thinking 2.5s in and 3 inch single out also...then I remembered that my muffler's single side is 2.5" also. Im not sure if it would still be benificial to bump up to a 3 inch pipe right after the muffler since its was already necked down to 2.5, or if that little bit of single 2.5 right out of the muffler would even make a big difference if I bumped it up to 3" afterwards.

 

If your running dual in to single out, you need to have the outlet larger due to the same exact affect of a SI/DO just reversed. The pressure of the 2.5" duals with LTs and cats coming down the pipes then hitting the Y joint in the muffler to exit 2.5" also will restrict and make it a struggle for gases and pressure to escape, so having a 3" outlet would better take care of that, just like you dont run a 2.5" inlet on a SI/DO with 3" outlets. The pressure, and scavenging need to flow properly to maintain full performance.

And since Magnaflow mufflers are straight throughs with internal Ys and Xs, you can just flip you SI/DO around ( that is if the single is 3" )