hey guys, on my 2002 5.4 i have a 2.5" si/so maggie 14" muffler, and i like it, but its not loud enough. i was wondering if i went from what i have now to a 3" si/2.5" DO 14" maggie if i would get some more sound out of it, and maybe gain some power?

thanks
Adam M

 

I honestly don't think you would get any increase in power and minimal sound gain with what your talking about. Why not just cut it off after the muffler??

 

True dual straightpipes with an x-pipe! (and the factory cats of course)

 

put a dynomax race bullet muffler on there. they are 40 bucks on summitracing.com. you'll like it

 

x2! Yea,... right before i got my true dual straightpipes i had dynomax race bullets, and they sound pretty damn good... They are pretty close to straightpipes, but not quite as loud... Nice deep sound!

 

blue, if ive currently got a y pipe after the factory cats to straight pipes 45'd behind the rear tires, how can i add in a x-pipe to this setup. i really like the sound of my truck, but ive heard that an x-pipe would bring some torque back that i feel that i lost with the setup im currently running... someone please draw a diagram of how this would work best!

 

I'm sure you could play with some things for sound, but you could run 6 inch pipes and not gain anything. The theory behind this is, you can only take in as much air as you can put out. So if you're running stock exhaust manifolds, all that air has to squeeze out into those massive pipes.

I've heard that not having enough restriction can hurt engine performance. I personally never ran anything over 2 1/2", I did notice some gains when I switched out my stock cat converters with some high performance ones.

 

You want sufficient airflow, while retaining backpressure for best engine performance.

 

Replace the Y with an X-pipe and then run the pipes off that

 

you guys really dont think ill get much more sound out of duals with the same length muffler? i did get talked back to 2.5-dual 2.5's to keep backpressure tho. i dont want my truck to be much louder than it is now, but i wanna hear it other than when im WFO! im not up for true duals. and are dynomax mufflers stainless? cuz our road maintainers put down way too much salt when it snows....

 

Going from SI/SO to SI/DO, you won't notice any sound difference unless you go with a shorter muffler.

 

So you have a Y-Pipe then it goes to duel exhaust?? What size pipe do you have?? The factory Y-Pipe will need to be cut and put an X-Pipe in place. Then have the pipe bent to match the rest of your system. The X-Pipe should be placed as close to the cats as possible.See my gallery for pics!!

Blue02FX4, either go with a shorter muffler like ParkM said or just cut it off after the muffler. It will not be too loud if you cut it off with a SI/So system.

 

My Dynomax muffler is stainless, but it's not a very loud model. I've put Dynomax on two vehicles, and my main reasoning for using them was the fact that they are stainless.

 

Replace your muffler with a y-pipe then run that out at 45's that would sound good