just had my progress 22mm RSB installed onto my cu2 which has a takeda SRI, teins super street coilovers and fujitsubo exhaust.

the ride so much better and makes the tune chipped engine so much more fun to drive...

but just note they is a tiny mod to the exhaust flangers that needs to be done but does not affect the exhaust one bit.

also SRI does not void your warranty...have checked this with a few dealers and they are all fine with it.