APP has put seasons of testing on this head and the results are impressive. These heads are on stock 850’s, turbo 850’s, 912 Big Bore and 912 Big Bore turbos. Powder Freaks was the first to design a head for the etec 800 and now They have the first 850 head. They spend countless hours testing on their in house dyno and out on the snow.
This head makes 10 hp over stock at 7850 RPM and is Dyno Proven!!
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