best hi flow ex manifold/drivers side

ch1ll said

I believe if you have a magnum manifold and a die grinder, you could have healthy flowing manifold.

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And send it to Extrude Hone Extrude Hone - Deburring - Polishing - Finishing metal parts

It is an abrasive material forced through items that smooths the interior of your manifold... places where it is hard to reach