hey man cheers.their is no aftermarket management.i cant really tell you how good it runs as i dont have it yet lol and havent seen it in person but pro has told me it runs really well i have only seen a vid of it and it sounds good.as far as i know it had a lot of time getting it to run well but im not to shaw i will let every 1 know how it goes hopefully by next wednesday..
tyson..