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Anyone know anything about what design elements (pipe diameter, length, bends, etc) make for best torque/horsepower, and optimizing powerband and stuff like that? Like for someone who was going to fabricate their own?
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-Ted
-1986 Mazda RX7 Sport [DD/beater]: engine finally let go at 205k. parts car status.
-1986 Mazda RX7 base [resto-mod project]: S5 n/a swap in progress.
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