well i have a rb header, 2.5 cat co hollowed cat, 2.5 pipe, into a dyno max bullet race muffler.... well after the test run a 5 block radius and my mom said she heard me the whole way through and took my keys and wont give em back till i make my car quiet... so i need a quiet exhaust that can flow bc of my mods(listed under my post on how to make a drag only FC).... i was thinking of a T2 stock cat back or a dyno max cat back.. give me ideas guys... thanks Dave

BTW i have a 87 GXL

 

Well, on a n/a FC... the car WILL be loud with the header. My best guess is get the presilencer. It won't make it incredibily loud, but it will lessen the noise down than it already is.

I think most of the noise is from the header...To my knowledge, I don't think the T2 cat back will do any siginificant change when having a n/a...

 

T2 cat back will be still louder than a standard NA exhaust.

But I agree with Christi, with the pre-silencer will help (or a CAT!) or swap out the header for a stock exhaust manifold and down pipe with presilencer.

 

greddy's got a quiet cat back but it ain't cheep

 

or.. you can just make your own straight pipe (Hey, if you can do that without spending the big bucks for RB or mazdatrix, etc to do it), I would go for that.

I dunno, I would go like for either (say if you wanted to keep the header):
1.
header
DP/MP
pre-silencer
2.5" piping

2.
header
straight pipe
pre-silencer
2.5" piping

3.
header
high-flow cat
pre-silencer
2.5" piping

Those would be one of the three choices I'd pick. Since Florida has no emissions, I don't have to worry about the missing cat, but I would look in the law of your state about emissions.

Or.. you can do what Icemark said, it'll work the same. But a pre-silencer is your best bet to help the loudness. It'll lessen it.... alot.

Racing Beat's Pre-silencer - $198.

Above:
Racing Beat's Pre-silencer. Not that bad. Get a quote from other places though. Like Rotary Performance - but I could be wrong. I'm not sure they sell them.

You could try Mazdatrix, but I believe they run the same prices as Racing Beat.

Good luck, Let me know how it comes out, and which way you choose to go