Ok I have an 03 Silverado SS. My current setup (how I bought the truck 5yrs ago) is a dual in/out flowmaster muffler behind the rear tires that flow threw huge 4" tips. I love the sound and love how when I drop it to 3rd it rumbles and pops. Well thanks to good old New England weather it's rotting.

So I need help. I like flowmaster but I have been reading alot of people don't and that it hurts performance.
I have been reading about Magnaflow and I am leaning towards them. But what part number do I go with 11379 or 12599. I want a Sweet sounding here i come exhaust. But i don't need to be walking up the dead as this is my DD. I have a "BLOWN" 70 chevelle for that. I will be putting OBX LT's on soon but not to soon. Also I will be sound proofing the truck in a few weeks as well.
I am not looking to spend a butt load of money as well!
SO please please help me out. Thanks

 

Wow no one with ideas or suggestions????

 

Here's my suggestion, Go to ebay look for wunder car parts find those # magnaflow and lowball them 300.00 or so on the make an offer .
That should make up your mind for ya.

 

I did a Magnaflow dual in single out muffler with a diesel 4" tail pipe on my SSS. Sounded pretty good outside, fairly quiet inside.

 

Well I think I am going to go with magnaflow exhaust dual in out muffler still undecided on which one tho. either 11379 or 12599

 

That sounds awesome thanks

 

i'd say go with flowmaster again. They say they don't flow as well but honestly its just a muffler, not like its adding 20hp, maybe more like 3-4hp. Plus once i added my flowmaster setup my butt dyno says it helped out alittle (def better than the stock muffler). Go for the sound and in MY opinion the flowmasters sound MUCH better. Magnaflow is too quiet for me.

 

x pipe up front, dual hooker aerochambers and turndowns right before the axle.

 

yea i agree with anthony hookers are the way to go

 

hookers aerochamber
http://www.youtube.com/watch?v=Jd6VjVlX184

dynomax true xflow muffler
http://www.youtube.com/watch?v=r5d5lng5uNM