I'm curious about the performance gain you stated. How did you measure this gain in performance? And, exactly how much did you gain? Thanks.

 

No dyno numbers for you, but Rush will tell you the best baffle size for perf with Stage 1 A/F is the 2" baffle, about 5% gain over stock. The 2" are too loud for my taste. The 1.75" baffle is a good combination of sound and slightly less perf gain. Rush is a sponsor here, Ryan is their rep. You can do a search for Ryan and contact him via PM, he will follow up with you. If going with slip ons and A/F upgrades you will need a tuner. If doing only mufflers, you will not. With no A/F upgrade the 2" baffle wont do much better then the 1.75"

 

The pre 07 SE muff's are close to what the Rush 2'' sounds like.

most all who got the new post SE muffs didn't keep them very long.

Good muffs, just tooooo quiet if U want her to sound off better.

If Ur only doing the muff's, the Rush 1 3/4''ers will make a little better TQ in the lower rpm's vs the 2''.

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