GX390 +.200 Stroker Crankshaft. 2.720"(69mm) stroke with standard crank pin diameter. Machined in house from hardened 4340 Chromoly to the exact standard you have come to expect from ARC. Dual plane...
Billet dual bearing sidecover for the 460cc OHV engine. Features dual crank bearings to reduce crankshaft flex and ball bearing camshaft support. Uses all 4 dowel pins for extra block support. Comes...