GM Performance GM Performance SP383 435 HP Crate Engine (PART #GMP-19355722)

Classics with more poweraGM Performance SP383 c.i.d engine assemblies produce performance! More powerful than ever, these small block strokers are built with cylinder heads that incorporate a new, high-rpm valvetrainaand lightweight aluminum cylinder heads based on the proven Fast Burn design with large intake runners and 2.00/1.55 in. valves. They also feature beehive-style valve springs that enable greater high-rpm performance and durability while allowing the SP383 to rev higher, building more power to complement its low-rpm torque. Unique valve covers distinguish the engine from previous versions, and it now includes a high-flow, aluminum intake manifold.

GM Performance SP383 engine assemblies also feature:

• 4-bolt main bearing caps
• Forged steel crankshaft
• Heavy-duty powdered metal connecting rods
• Hypereutectic aluminum pistons
• Hydraulic roller camshaft