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Custom 3 inch piping into a dual tip magnaflow muffler. Ran it on a customers RB and it was nice. Will cost around $250-350 from a good shop that either does mandrel bending or stocks mandrel bends.
I ran a JDM ST May 3.25 piping with a Magnaflow dual tip on my RB car and it worked well.
Do not stick stock size exhaust piping on your SR or RB unless your into restricted HP lol
Turbo engines like to breath. The trick is at the rear end of the car. Running a dual tip 3 inch inlet muffler is the trick. If you don't run a resonator in the middle than go for a long 18inch muffler. If you run something in the middle you can run a shorter 13inch muffler.
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