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Good going Bill. That is just plain great. Here is a tip.
The stock RX8 manifold makes 247 HP at 8500 RPM. You will need a bit shorter
runners to get peak HP at 7500 RPM

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Paul Lamar

Shouldn't that be a little longer?

Bob W.

Could be. Won't know for sure until sombody dynos it.

BTW Bill, You might need four yellow and two red RX8 injectors
for anything over 200 HP.
Tracy tell me the low power secondary RX8 injectors are blue.

Paul Lamar