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Go back stock. 350 HP is plenty for autocross. Unless you are going to start running track events all you will gain is rear tire spin.
The more you modify the more the reliability go away. Remember what all that power did to your 944.
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Glen
49 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
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