No comparison, the 18° will make more power if ported - you need to be looking at the 235 AFR or the Profiler 245 AirWolf from Dr. J's or Chad Speier Racing heads if you want a 23° head that will make power close to what the 18° can give, the 210 AFR isn't even close. Profiler info at www.1320techtalk.com
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