if it change my rpms it wasnt very much. and it might be deceving cause you only hear the motor and dont really hear the exhaust anymore. but i havent noticed anything out of the ordinary on mine. i run 4k - 5k lbs surfing. 2012 axis a22. all in all best stereo upgrade i could do. and i dont smell the exhaust well surfing anymore. neighbors like it when i run at night. they dont hear any more at 1 am.
Last edited by rugbyballa3; 05-30-2014 at 11:32 AM.
Reason: added some