All the Rx8 users that have installed the Borla system seems to love their exhaust! They say the increase in sound works great... its not loud all the time but when you take off it really sounds off now! They are guessing the HP increase around 6 - 9hp much like we are guessing for the Xfire... They also get the sweet flame pop ... I dont think our engine can do that... but the stock rotary in the 8 allows it to shoot out flames at high revs !! ... Gotta love the frog! its a sweet little car

but I just thought id post letting everyone know how much they enjoy their addon!!

ahhh and it costs them around 500 - 650 for the exhaust it seems like...