does anyone no if an exhaust system that is designed to fit a classic STI type R will fit a classic 4 door STI? both version 4

 

Yes, it will fit

 

thanks FB Tuning

 

any ideas how to tell the difference between blitz nur spec S and R? when buying second hand that is. i no that they are not inter-changeable, and dont want to buy what i think will fit but wont.

 

S is just the back box with a std sized 2.5" inlet and flange.

R is a system comprsing bb and 3" centre. It has true 3" flanges at centre to bb end. But 2.5" flanges at d/p end, so as to mate to OEM sized d/p flanges.

See answer to your other thread too...