ATK Engines SP76-B Features:

This short block is built for engines that will be running Boost or Nitrous.

ATK Engines SP76-B Block Information:

• Seasoned OE 1999-2007 GM LM7 5.3L
• Bore/Stroke: 3.903 in. x 3.622 in.
• Displacement: 347ci
• Camshaft Bearings: Installed and clocked to OEM position
• Freeze Plugs: Installed and sealed
• Oil Galley Plugs: Installed and sealed

ATK Engines SP76-B Rotating Assembly:

• Crankshaft: OE reground .010"/.010" 24 tooth reluctor wheel
• Rods: Scat Pro 4340 Forged I Beam Rods with ARP 8740 bolts
• Compression Ratio: 65cc= 9.5:1 67cc= 9.3:1 / 70cc= 8.9:1
• Pistons: Wiseco 2618 Forged dished -11cc
• Rings: Wiseco GFX (alloy steel top ring)

ATK Engines SP76-B Recommended Components:

• Balancer: Internal balance
• Flexplate/Flywheel: Internal balance
• Head Gasket: .051 in. thickness or per application
• Oil: 10W40 Non-synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application
• Oil Pump: Melling pn# 10295 with high pressure spring

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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