BMW Performance Exhaust on 135i

[modenaPSU]

I just bought a new BMW 135i a couple weeks ago (it will be here at the end of May). When I was testing driving various BMW's, I feel in love with the BMW Performance Exhaust sound on the 135i. But I have been really hard pressed to find the hp/torque gain from their upgraded exhaust. Does anyone know what the exact figures are on this?

Thanks. (And I did search the forums for this question and couldn't find it. If I just missed the answer, just link me to it!)

[993 911]

It's like a measly 5hp/7tq, sounds damn good though.

All the gains are to be had with the ECU, downpipes, intake, and FMIC.

[djminkin]

Yeah adding 85HP with a tune is the best way to go. Im thinking of going with Dinan to keep my warranty in tact, but they all seem to have incredible gains.

[135ARG]

BMW claims 5hp @ 6000 but BMW tends to be modes when it come to figures... so i would expect anywere from 5 to 10hp.. but i can tell you that the sound is great