Power up your 5.7L/350 Marine Gen I SBC w/ 1pc Rear Main with the Enginetech RMM350A Re-Ring Kit. This kit delivers high-quality components for a reliable engine overhaul. Includes standard piston rings (R40058), rod bearings (BB253J), main bearings (BC296J), and full gasket set (M350L-A). Free shipping included. Note: Kit photo is generic; actual parts shown individually. Rod and Main bearings are offered as the same size. Contact us for different sizes.