Speedmaster 383ci Stroker Rotating Assembly Kit Small Block Chevy 350

Speedmaster 746-PCE290.1146 rotating assembly does not come with rings.

The Speedmaster 746-PCE290.1146 rotating assembly will work with a stock flexplate and balancer.

Here is the information we received from Speedmaster; Part Number: PCE290.1146 Part Type: Engine Rotating Kits Actual Engine CID: 383 | Bore (in): 4.030 in. | Engine Stroke (in): 3.750 in. | Balanced: No | Pistons Included: Yes | Piston Rings Included: No | Piston and Ring Oversize (in): 0.030 in. | Piston Material: Hypereutectic aluminum | Piston Style: Flat top, with four valve reliefs | Piston Head Volume (cc): -4.00cc | Wrist Pin Style: Press-fit | Piston Ring Facing Material: Plasma-moly | Crankshaft Included: Yes | Crankshaft Material: Cast steel | Rear Main Seal Style: 2-piece | Engine Balance: External | Connecting Rods Included: Yes Connecting Rod Material: 5140 Chromoly Steel | Connecting Rod Beam Style: I-beam Street | Connecting Rod Length Center to Center (in): 5.700 in. | Rod Bearings Included: No | Main Bearings Included: No | Cam Bearings Included: No | Gaskets Included: No | Oil Pump Included: No | Camshaft Included: No | Lifters Included: No | Timing Chain and Gears Included: No | Plastigage Included: No | Assembly Lubricant Included: No | Quantity: Sold as a kit. | Crankshaft Procomp Electronics cast crankshafts are perfect for mildly built street engines or just to replace stock crankshafts that have seen better days. These Procomp Electronics crankshafts are precision-ground and micro-polished to exacting tolerances. Connecting Rods Procomp Electronics I-beam connecting rods incorporate all of the best features possible for an I-beam rod, including some strength adders found in H-beam designs. Procomp Electronics I-beam connecting rods are profiled with clearance for long stroke applications. These connecting rods feature a one-rib cap design for added strength and bearing support, polished beams to eliminate stress risers. Procomp Electronics cap screw bolts to greatly increase strength and horsepower capabilities. Procomp Electronics I Beam Street connecting rods are manufactured from high quality 5140 chromoly steel. The rods are x-rayed and ultrasonically tested with all surfaces shot peened and stress relieved. Pistons Hypereutectic pistons with anti-friction skirt coating are manufactured from a aluminum alloy which contains 16 percent silicon for greater strength and wear resistance. By combining the hypereutectic alloy with the permanent mold process, the piston is strong, lightweight, and thermally-efficient. These pistons run tighter piston-to-wall clearances, improving ring seal and longevity. They are ideal for street, bracket racers and oval track.