the stock Y pipe set-up is a real limiter and it will kILL an ALPHA outdrive running all that heat through it. Running the exhaust through the transom will help the outdrive live MUCH better as well as freeing up some HP. The Y pipe is only rated to about 300-325HP for a small block, and many people report picking up quite a bit of top end by just installing the diverter set-up.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR
2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD 
AND THE PINK JEEP!!!! R.I.P.
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