Well after speaking to a couple parts suppliers, Trust/Greddy is producing a Trust Racing titanium exhaust that is supposed to be so new that it isn't even listed in catalogs. HERE is the link to the Trust website of the Ti-R. After clicking the Mazda application guide, it shows an FD model with 90mm piping over the standard 80mm

 

to bad we dont have a sound to test to see if its an annoying sounding exhaust

 

Probably sounds close to the current Greddy Ti....

 

I ordered the 80mm version today so maybe I'll grab a sound clip. Turns out the 90mm is a special order option from japan with a $1600 retail maybe next time.

 

yeah, post some results after u get it

 

is there really any noticable diff between 80 and 90mm?

 

this exhaust is going to be really loud

 

a centimeter more diameter = wayyy more flow

 

90mm is 3 and a half inches vs 80mm which is only 3 inches...