Full exhaust for turbo M2?

[ATSChristin]

We have a FM 2.5" downpipe back exhaust on oiur 99 Miata. Does anyone make a 2.75" or 3" downpipe back exhaust? Anybody ever dyno the difference?

Christin

[altiain]

I don't know about any off-the-shelf exhausts, but you could try Kinnney's Muffler in Hurst (corner of Brown Trail and Pipeline) for custom exhaust work. Theyhave reasonable prices and access to a mandrel bender, iirc.

Or better yet, give FM a call and ask them if its worth it. Chances are they've tried it.

[Titus]

I seem to remember Kieth from FM posting on the pointy board that they have dyno tested larger exhausts and found that there was only a very slight improvement that was not worth the added noise it produced.

[fwMiata]

i think enthuza makes a 3"
www.enthuzacar.com is their website i think.

[ATSChristin]

I seem to remember Kieth from FM posting on the pointy board that they have dyno tested larger exhausts and found that there was only a very slight improvement that was not worth the added noise it produced.

I believe that is true with the turbochargers that FM uses. However, we are planning to upgrade out T25 ball bearing to a home grown T28 I've done this on 2.0 Nissans with excellent results. Basically adds about 30 whp.

Aaron

[fwMiata]

cool, i know im going to use a 3" when i get around to my project...

[Screamin'Screw]

I have been very happy with my 2.75 enthuza cat back