right now we are in R&D next will be the X pipe in it because it is a little too loud ,,I ran it at the track last night and from the last time i ran (with out this exhaust) i gained 4 tenths from 9.0 in the 1/8 to 8.65in the 1/8 Randy was there with me he was running 8.61 to my 8.65 why we ask.? Exhaust has a price of 799.00 with groupe price of 750.00 for the must have 5 orders. put your names here and hector will be in touch. thanks jim