Jp1 is ok , It actually feels pretty similar to the Jp2 on the B5,But i lost a lot of fuel mileage with that pipe. So far Im loving the 2013 but I am going to try the ttr 2035 pipe tomorrow, its the only pipe left I want to try, BUt I already dont like that it is so long! I will have to cut my body out in m8 D8 in the front becasue it sticks out the front. Also the pressure nipple is right on top when mounted and it also hits my body. NOt angled in toward the engine like most others so it wont run one the body. I will probrably try it ans then put my 2013 back on. I dont wanto hack up my body for the pipe, BUt I will at least try it out.