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Originally Posted by sbrown.nw
How did your car turn out?
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It turned out great. It has an RS cam and 3.8 build 7K miles ago from a previous owner, as well as close ratio gearbox and LSD, but stock exhaust (except with secondary muffler delete) and stock intake. Al installed the Rasant ITB kit along with headers and a valved Ti 991 GT3 center exit muffler. Overall it is MUCH smoother than before. The ITBs can clearly handle much more cam. It went from feeling like an old school race car to more like the stock GT3s I’ve driven.
The car is quieter at idle and cruise. The exhaust note is higher pitched. It roars when you add throttle/load and the valves open.
The car has really come alive in the mid range and up. The part throttle response is incredible. I felt it most often when weaving between cars on the freeway, but tbh I haven't driven it that much because the rear bumper is still off. It goes to the body shop in two weeks for the rear bumper to be modified to accommodate the new center exit exhaust.
As to intake sound, I think the GT3 plenum mutes that considerably. I do get some brilliant new intake notes when I come off throttle. If you want intake sound then suggest you go with trumpets.