The smallest of the ATP bolt-on MS3 turbos, the GT2871R is a perfect high-horsepower daily driver turbo when coupled with the MZR 2.3 liter Mazdaspeed motor. The GT2871R is efficient up to 21psi and is rated at over 400 crank horsepower on the 2.3 liter. This turbo is very highly recommended for the all around power up to 400hp, producing "a lot of area under the curve".
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