just to point out an earlier statement... the 181 is either a LET or EuroCharged pulley... ASP is 178...
I have the LET 181, NW Dual CAI and LET tune in the Aero... I may not be the fastest, but I will be happy to let them prove it at the track....

...now that I have better fueling/AFR's I will see if it is any faster next spring....

(and an LSD installed wont hurt either)