Red Line Oil 12504 - GM Performance Parts 350 HO Engine

A value-priced 350 with 330 horsepower!

This engine doesn't sacrifice power or durability with its four-bolt main block, nodular iron crankshaft, PM steel connecting rods, and cast aluminum pistons. Add to the strong foundation a pair of cast iron Vortec 64cc cylinder heads with 1.94'' intake and 1.50'' exhaust valves, yielding a healthy but streetable 9.1:1 compression ratio (ideal for muscle cars and street rods). The camshaft is a modern dual pattern interpretation of the 1965-67 Corvette 327 cam with more exhaust lift/duration for improved combustion chamber clearance and less intake lift/duration for more cylinder pressure.

330 HP @ 5000 RPM

380 ft/lbs torque @ 3800 RPM (Max Recommended RPM: 5500)

Compression Ratio: 9.1:1

Cast Iron 4-Bolt Block with One-Piece Rear Main Seal

Nodular Cast Iron Crankshaft

Cast Aluminum Pistons

PM Steel Connecting Rods

Cast Iron Vortec 64cc Cylinder Heads (1.94" Int/1.50" Exh valves)

Chrome valve covers

Dual Pattern Cam (Lift: .435" Int/.460" Exh, Duration @ .050": 212° Int/222° Exh)

1.5 Ratio Rocker Arms

Recommended spark plug: Accel #111-516 or any with 14mm, .708'' reach, 5/8'' hex, tapered seat, projected tip

Chrome timing cover

Oil dipstick on right side

Note: Intake and exhaust manifolds, distributor, flexplate, damper, and water pump not included

Warranty Information

Complete list of GM Performance Parts 350 HO Engine

Red Line Oil #816-12504

Red Line Oil 12504 Details

20W50 The ultimate high-temperature protection in Red Line engine oils recommended for street use. Good for engines that regularly run very high oil temperatures. Best for engines that run large clearances such as air-cooled engines or large-displacement, all-out racing engines that see occasional street use. Provides 25% more viscosity in bearings than petroleum 20W-50s. Not recommended for use in cold climates where temperatures are at or below 10°F or -12°C. Not recommended for street use in production engines that see sustained oil temperatures below 225°F (those engines should use Red Line 10W-30 or 10W-40).