| | what you need they feature rectangular intake ports and d shaped exhaust ports for ... steel swirl-polished valves 1.850 intake and 1.610 exhaust chrome-moly ... hole are plugged off available in cast aluminum finish or wrinkle finish ... set black wrinkle performer rpm 1200 intake manifolds 239518 for flange mount ... parts 235556 exhaust seat 235557 intake seat 235558 exhaust valve 235559 intake ... valve 235560 exhaust valve guide 235561 intake valve guide 235568 valve guide oil ... they feature a high density centrifugal cast iron alloy sleeve the alloy contains ... will raise compression ratio to 10.25 to 1 cylinder sets are available with ... installed the 72 cc heads use 1.850 intake and 1.615 exhaust valves the 80 cc ... heads use 1.940 intake and 1.625 exhaust valves fits big-twin ...
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