318 Port match heads to Performer RPM Intake

toolmanmike said

Nicely done. It makes for a smoother transition but not a big increase in flow. It would be interesting to see a before and after on a flow bench.

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Seems like smooth port flow is one of the secrets to the small port 318s, and big 2.5" exhaust system all the way to the back to help suck the hot gasses out.

Interesting how it works out even with stock exhaust manifolds.