With the Greddy TT kit do I need to replace my R/T cats and get test pipes ?

what do you TT guys recomend ?

test pipes are not legal were I live but if I get much more out of the turbos then I'll do it !


Thanks !



Tasso-

 

Free Flowing exhaust = better. I would do it, but thats just my opinion.

 

Is my borla exhaust good enough or should I get a better one ?

 

Borla is fine, and the straight pipes will add about 20-30hp and trq across the powerband. Your peak will likely be about the same, but it just gives gobs of power increase in the midrange. at least that was findings on the dyno...and I think APC documented the same thing as well.