JAMES GASKETS GASKET ROCKER COVER LOWR RUBR 883 1200 SPORTSTER 5/PK 17353-89 type_gun-scabbard-boot-bed-mount so the factory advance curve

so the factory advance curve is maintained

MFG Part Number:   AIR-90-AN-B-FL

MFG Part Number:   20-20435

Chris has come up with 4 new cam lobe profiles to squeeze the performance out of the smaller multivalve ports

Only hard chrome replacement shaft on the market

JAMES GASKETS GASKET ROCKER COVER LOWR RUBR 883 1200 SPORTSTER 5/PK 17353-89 type_gun-scabbard-boot-bed-mount so the factory advance curveProduct Name: GASKET ROCKER COVER LOWR RUBR 883 1200 SPORTSTER 5 PK Product Type: Evo Sportster Rocker Box Assembly Gasket Brand: JAMES GASKETS MFG Part Number: 17353 89 Features: Genuine James Gaskets uses state of the art materials and production methods to make the best gaskets available Made in the U. S. A.