Cram*

It all depends on how much power you want to push and gear ratios etc... The r154 can hold so much more power, but its too long and will force me to make clearance to the tunnel. The w58 can hold a good amount of power and it snugs pretty well in the tunnel. Also the shifter will be in the stock location is also a big plus to me. I don't want to have to cut up the tunnel and the shifter for the r154 is 3 inches back. Im not trying to push 600 plus horses. My goal is 450rwhp with twin turbo with mildly built internals in the future.