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Reply to "exhaust?"

Yeah, I doubt either Pat or Henry will be able to help you with what's in the engine. The chart was put together by an enthusiast engine builder/Hot VW's reader and was published in an article in the magazine in 2012(?). How high did the engine rev with power originally? When you replaced the 90.5's with the 92's did the deck height or rocker geometry change?  Even with the increase in displacement, the heads and carbs should still let it make power to it's original redline (or very close to), but the only part that's marginal is the exhaust. Both CB Per. and A1 do Sidewinders with dual tips.

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