[StangsGirls8602]

Okay I am getting a new exhaust for my '02 3.8L mustang. I am not getting new headers now and I plan on keeping the original cat converters. I know i want 2 flowmaster mufflers, so first off which kind should i purchase? i want a deep sound and nothing ricey so any suggestions on which muffler will help alot. and my next question is my local shop is going to make a question pipe but should i have them cut where the Y is and make it an X pipe or cut the Y off and make straight pipes? Which would be louder/deeper, better gas mileage, and most of all cheapest? all and any input is veryyyyyy much apprieciated.

 

[Markstang]

so many people get flowmasters.. they usually go with 40's i think.. x or divorced wont affect mileage much.. x's supposedly get more of a rasp.. straight should be deeper and cheaper lol less fabricating..

 

[Silver J]

This might be a hijack... but it's sorta along the same line of questioning... :yelwacko:

Stock tubes are 2.25" right? Should the OP (and myself) keep 2.25" after the cats or go with larger 2.5"? I thought most aftermarket kits were 2.5"... why is that and where do they make the expansion? :?:

 

[Markstang]

Stock tubes are 2.25" right? Should the OP (and myself) keep 2.25" after the cats or go with larger 2.5"? I thought most aftermarket kits were 2.5"... why is that and where do they make the expansion? :?:

yeah 2.25.. i know my pypes kit is 2.5.. it just bolts onto the y so i assume it just adds that extra quarter inch after the connection.. most kits are the bolt onto y-pipe one and i assume alot of the custom jobs just run with the 2.25 otherwise ud need a fitting that would make the 2.25 to 2.5 jump on each side.. in the future i wanna open up the exhaust a little more so ive been contemplating how it would work..

 

[Silver J]

OK, that's what I thought (that it expanded to 2.5" after the inverted-Y)... I'll probably just stick with the 2.25" stock sizing, cuz that will be cheaper. :shigrin

Although I have seen adapters (called reducers) that could go from 2.25" to 2.5", so I guess it's possible. :yelwacko: But I think that going larger after all that restriction of the cats would be pointless (up for debate)... I'd probably only go to 2.5" if I redid the whole thing from headers back -- and I don't have the money for that right now! :laugh:

Oh, BTW - I'm planning a dual side exhaust kit from Jegs with Thrush glasspacks. Just wanted to get the sizing right.

 

[Markstang]

yeah well the mufflers i have are already sized to 2.5 at the inlets and outlets so id HAVE to find reducers somewhere if i were to do anything about it :shrug

i think we've answered the OP's questions let us know if you have anymore