Thread: B14 Aftermarket exhaust kit system choices (direct bolt-on)

Updated Turbo mufflers at bottom of first post.

Update! 03/23/2014 - I recently became more interested in a quiet system. So a bit more searching and nudging from other members around spawns another update to this thread, almost four years later. Resonators are a tough choice, you can go with one large piece which I have in the past at least twice now. I was not too bothered by my results but age makes me want it quieter without adding a turbocharger....

Here are new mufflers I have found that are pretty even as far as inlet and outlet measurements and locations. Price varies from $40 to $65 for the mufflers I found on the same web site.

Turbo mufflers are not a straight through design so an increase in backpressure will happen. Results and how much will vary. Here are the best options I have found so far from some heavy hitters in the exhaust muffler industry that utilize similar properties/technologies/style to decrease overall noise while cruising.

Summit Racing - Thrush Turbo 17718
Photo: Thrush PDF Other Link: Info about Thrush turbo mufflers in PDF and some here

Inlet/Outlet Size: 2.5in./2.5in. Center/Offset
Body Shape: 4.25in. x 9.75in. Oval
Core Size: 2.5in. via three chambers
Body Length: 20in.
Overall Length: 25in.

Summit Racing - Cherry Bomb Turbo 87752
Photo: Info about the Cherry Bomb Turbo mufflers and other sizes

Inlet/Outlet Size: 2.5in./2.5in. Center/Offset
Body Shape: 4.5in. x 9.75in. Oval
Core Size: 2.5in. via three chambers
Body Length: 14in.
Overall Length: 18.5in.

Summit Racing - Dynomax Super Turbo 17733
Photo: Info about the Dynomax Turbo mufflers and other sizes
[img][IMG]http://www.dynomax.com/skin/frontend/default/dynomax/images/mufflers/landing_st_main.jpg[/img][/IMG]
Inlet/Outlet Size: 2.5in./2.5in. Center/Offset
Body Shape: 4.25in. x 9.75in. Oval
Core Size: 2.5in. via three chambers
Body Length: 14in.
Overall Length: 18.5in.

Summit Racing - Magnaflow XL Turbo 13256
Photo: Info about the Magnaflow XL mufflers and other sizes

Inlet/Outlet Size: 2.5in./2.5in. Center/Offset
Body Shape: 4in. x 9in. Oval
Core Size: 2.5in. via three chambers
Body Length: 18in.
Overall Length: 24in.

The Thrush has the largest volume , followed second by the Magnaflow XL, then the Cherry Bomb and last is the Dynomax of these four turbo mufflers that all utilize three chamber technology, 2.5" center/offset mufflers.


Hope this helps

dang, this thread is killer and quite old, sucks I never seen it before. I noticed you have the OEM gasket as best for the lowport from the head, stupid question as im sure they are the same, do they line up pefectly with the highport as well?

would you happen to know where a good 3" gasket would be for the cat, I have the 2.5" header/downpipe assy that goes into the factory cat to a 3" exhaust, and I'm 99% sure that my cat is bad and need to replace it, So I figured i would throw a 3" on there while im replacing, and would like the gasket to cause as little restriction as possible

yes the header gasket are the same. are you planning on upgrading to a 3" cat? if not, I'd run the stock 2.5" gasket.

great, thanks. Figured so but wanted to be sure, when I posted that I meant 3" cat on there, but must have left it out, so . . . yes.

^^ search for the subadu catback exhaust gasket. I should have a picture of the Grimspeed one on one of my catbacks but cant seem to locate it right now.

not being a dick but subadu, or subaru?

same thing, lol