Sold out 6564-C GX390 +.200 Stroker Crankshaft 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... ₹49,089.81 Out of stock