No one has found one yet to my knowledge. From seeing how many people jumped Steph about the Injen intake, we'd definately hear from *someone* that there's one out there. Stay tuned and take care of the car until then. ;P
thats not true its not so much the down pipe its the cat thats stuck to the end of it and then the other cat that follows. i am going with a test pipe and 02 simulators and from what i have been told this should be good for 5-10 hp
i'm goin off the experiences of spicy and others who have had a custom exhaust fabed up for them. injen themselves prototyped a 3" exhaust on spicymsp's car and got no gains or losses.