This is a different type of question, so I'm leaving the flame suit in the closet. I recently aquired an S5 TII motor, now it's going in the 81 GSL. I know I have to have a custom DP and MP.

My question is, since I already have the RB SP exhaust for the 12a, would the RB muffler be too restrictive? I was thinking about having the muffler shop run a custom DP and MP to the RB muffler, but wasn't sure how well that would work.

The motor is a JDM S5 TII engine with aftermarket ECU, and BOV. Stock TMIC. I'll be putting an -SE front cover and oil pan on it as well.

 

Restrictive...YES. Remember, turbo's like large exhaust/mufflers (2.5-3"). Look at the pipe diameter on the SP rear muffler....tiny. It will be on the quiet side though....

 

yea it will sound good, but won't flow anywhere near enough. i run a 3" mandrel bent exhaust i custom made from turbo back.

 

FB II, do you have a pic? Also, what muffler(s) or presilencers did you use?