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Mufflers or stay w/ stock

mscally07

mscally07

New member
Just purchased a 2.5" downpipe w/ cat from zzp. Would flowmaster 40's make a bit of a difference in hp and sound or should i just stick w/ stock. Also, do you think the stock exhaust piping makes a difference as compared to new stainless pipe? Im planning on getting Mufflers now but only if its worth it. Any comments would help. Thanks guys.
 


the 40's don't sound too bad to me... as for performance I don;t know how much difference they'd make... I'm doing a cutout
 
I remember reading somewhere, not sure....but I know for a fact that 2 people tested flowmasters vs stock on a dyno, and actually lost around 8 hp.

Apparently, they're not a good performance application on our cars.
 


Ive tested a few aftermarkets on the 3800...I think they all sound like crap. These cars just dont have a good sound :( Stick with stock
 
stock mufflers flow quite well. its kinda hard to find a muffler comparable to it....

I'd stick to stock. plus they sound nice
 


Your better off getting a full catback. Changing mufflers wont really help any. Im happy with my SLP.
 
i run 3in racing pipe from the header back to flowmaster 40's. I like the sound quality. i would suggest that you keep your resonator in because that will keep the rasp to a minimal. I as well am putting a cut out in.
 
Thanks for all the help guys. I'm not getting headers so im getting a zzp ported PLOG to go with my zzp downpipe w/ cat. Just want to free up some exhaust flow for later on when i have enough add ons to put a 3.4" pully on. Well here, I have: WixAired CAI w/ 9" K&N cone, Autolite Platinum 104's plugs, 2.5" ZZP downpipe w/ Magnaflow HF cat, 180* tstat, and my brother owned a HP TUNER so he is going to tune my car for me a.s.a.p. I dont want to be like some of the NOOBS out there that basicly toss a 3.4" pully on a stock friggen engine and chip a piston. I might even go with a 3.5 if i can find one that not outa stock. What do you guys think? GO with 3.4" now or 3.5; or go with either with some more mods?
 


you should do the u bend delete as well

you should be able to handle a 3.4... but I don't have any experience with it so I'm just going by other peoples comments
 
QwikGT said:
keep the stock mufflers, flowmasters sound like crap
Click to expand...

i totally disagree!i got a zzp 3 inDP with cat and flowmaster cat back with delta 40's with dual rolled tips,i get complimented all the time from random ppl about how good my car sounds.
 
i say 3" DP and take your mufflers out and replace them with regualr pipe and through some nice titps on it:th_thumb-up:
 
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