Additional Information

• Must be balanced by a qualified machine shop before use, intended for internal balance
• Displaces 445 ci
• Standard 360, 390, and 410 bore is 4.050 in.
• Mahle 4032 Forged Pistons
• 5140 Forged Steel "SIR" I-Beam Connecting Rods w/ 7/16 in. APR 8740 Rod Bolts
• File-Fit Piston Rings 1/16, 1/16, 3/16 in. Thickness
• Performance Street Bearings
• Recommended for use in pump-gas, street engines. No power adders. 

Compression Ratios

Calculated at 4.165 in. bore size, the actual ratio may vary.

• 76 cc Chambers - 9.8
• 88 cc Chambers - 8.9

Crankshaft Specs

• Rod Journal: 2.200 in.
• Rod Journal Width: 2.000 in.
• Main Journal: 2.749 in.
• Typical Weight: 76 lbs.

Connecting Rod Dimensions

• Length: 6.700 in.
• Pin Fit: Bushed
• Rod Journal: 2.2000 in.
• Housing Bore: 2.3250 in.
• Pin Size: 0.990 in.
• Big End Width: 0.9900 in.
• Pin End Width: 1.1250 in.
• Thickness Above Pin: 0.210 in.
• Typical Weight: 860 g
• Torque: 63 ft.-lbs. with moly lube