Now.. im going against everyone else whos replied in this thread... but I've got a 2.5" stainless mandrel bent system from the Lukey extractors back, with a 3" tip on the end. I wouldnt say that its too loud on mine, and its an auto too.. so in theory it should be very droney, but its not.
The only bad thing about having the 2.5" with a real low XF is that when i have anyone on the back of my car it lowerers it just that little bit extra and the exhaust touches the diff on road bumps and you hear a *clunk* sound :) (coz the exhaust goes over the diff)
But I must confess, even my cousin who knows quite a lot about cars suggested for me to get the 2.25" coz he knows someone who put an xf on the dyno with a 2.25 and then put a 2.5 on the car.. and apparently there was no difference.. or maybe the 2.25 was better! I cant remember. :oo1:
Xtreme 275.6 rwkw, 12.93 sec quater, Phoon CAI, Siemens Injectors, StealthFX BOV with XBOX