I've been running an S4 13Bt and t04 in my -SE for a year or so and have decided to step up to a Bridge-Port and an even bigger turbo. My current setup consists of an HKS log manifold and 44mm Tial wastegate plumbed into a custom 3" exhaust. I'm using a Racing-Beat pre-silencer from one of those "turbo-back" exhaust systems, followed by an 18"-long Magnaflow Stainless Steel-packed bullet muffler, an ISC Racing bend over the axle with a Borla XR-1 Racing muffler to finish it off. Literally every possible inch of usable space is taken by muffler. With just the Street-Port the exhaust is disturbingly, painfully, horribly, loud. I'm afraid it's only going to get worse with the Bridge-Port.



Which mufflers do the best job of shutting-up a BP?

mazdacomp lava rock

Sing, sing a song

Sing out loud

Sing out strong

Sing of good things not bad

Sing of happy not sad.



Sing, sing a song

Make it simple to last

Your whole life long

Don't worry that it's not

Good enough for anyone

Else to hear

Just sing, sing a song.

put a couple u bends in there and add more muffler!

Hmmmm, you may want to try a presilencer to get rid of some of the high-pitched, chainsaw raspy sound. It may also help with overall loudness. As far as mufflers, I am n ot sure, but the Apex'i setup that's on a customer's FD of mine w/ an HBP sounds fairly docile and tame compared to others.



B