nah i dont' think its the exhaust being too restrictive .. i can't see how it can ... the only way to know is when i get the boost controller really .. but yeah the car is definitely 100% better especially now that i got a wheel alignment from bridgestone... free plug for bridgestone at mile end on henley beach road ... the guy was great .. cant' remember his name ... but i went to the one on gouger but it is closed due to renovations and the other guy said that that larry fella who all u guys love has left bridgestone and is now going to be working for the goverment?? ... guess hes following in steves footsteps ... but yeah now im taking corner faster without even hearing the wheels screech ... what a difference it makes!!!! ... the guy doing my car told me it was way off before he fixed it ... can't remember exactly what he said but it had 16mm toe in? or something like that?? LOL when it should be 2 hehehe