Proform Parts High Torque Starter (MPN: 66277)

High-output motor with advanced gear reduction for superior cranking power.

The Proform Parts High Torque Starter features a robust design that enhances engine performance through its high-output motor. With a gear reduction ratio of 3.75 to 1, this starter spins the engine over faster than standard models, providing 40 to 50 percent more cranking power. The offset design allows for increased oil pan clearance, making it a practical choice for various engine setups.

This starter is equipped with a 2.20 kilowatt motor, ensuring reliable performance under demanding conditions. The black and silver finish adds a sleek look while maintaining durability. It includes all necessary mounting hardware for straightforward installation, making it suitable for both professional mechanics and DIY enthusiasts.

Designed for a flywheel or flex plate tooth count of 168, this starter is compatible with a range of applications. The gear reduction type enhances efficiency, making it a valuable addition to any high-performance engine build.

Features

• Gear Reduction Type
• The High-Torque, High-Output Motor Spins The Engine Over Faster Than Stock Starters, Delivering 40 To 50 Percent More Cranking Power
• Offset Design For More Oil Pan Clearance

Specifications

• Manufacturer: Proform Parts
• Manufacturer Part Number: 66277
• Condition: New
• Flywheel/Flex Plate Tooth Count: 168
• Color: Black/ Silver
• Type: High Torque
• Drive Type: Gear Reduction
• Gear Reduction Ratio: 3.7:1
• Includes Mounting Hardware: Yes

Compatibility / Fit

• 2007-2013 Chevrolet Avalanche
• 2002-2006 Chevrolet Avalanche 1500
• 1998-2002 Chevrolet Camaro
• 2010-2015 Chevrolet Camaro
• 1994-1996 Chevrolet Caprice
• 2011-2017 Chevrolet Caprice
• 2009-2012 Chevrolet Colorado
• 1997-2013 Chevrolet Corvette
• 2003-2014 Chevrolet Express 1500
• 2003-2017 Chevrolet Express 2500
• 2003-2017 Chevrolet Express 3500
• 2009-2020 Chevrolet Express 4500
• 2006-2009 Chevrolet Impala
• 1900-1900 Chevrolet LS Small Block Gen 3 1997-2007
• 1900-1900 Chevrolet LS Small Block Gen 4 2005+
• 2006-2007 Chevrolet Monte Carlo
• 1999-2013 Chevrolet Silverado 1500
• 2007-2007 Chevrolet Silverado 1500 Classic
• 2001-2003 Chevrolet Silverado 1500 HD
• 2005-2006 Chevrolet Silverado 1500 HD
• 2007-2007 Chevrolet Silverado 1500 HD Classic
• 1999-2004 Chevrolet Silverado 2500
• 2001-2014 Chevrolet Silverado 2500 HD
• 2001-2006 Chevrolet Silverado 3500
• 2007-2007 Chevrolet Silverado 3500 Classic
• 2007-2014 Chevrolet Silverado 3500 HD
• 2014-2017 Chevrolet SS
• 2003-2006 Chevrolet SSR
• 2000-2014 Chevrolet Suburban 1500
• 2000-2013 Chevrolet Suburban 2500
• 2000-2013 Chevrolet Tahoe
• 2006-2009 Chevrolet Trailblazer
• 2003-2006 Chevrolet Trailblazer EXT
• 2009-2012 GMC Canyon
• 2005-2009 GMC Envoy
• 2003-2006 GMC Envoy XL
• 2004-2005 GMC Envoy XUV
• 2003-2014 GMC Savana 1500
• 2003-2017 GMC Savana 2500
• 2003-2017 GMC Savana 3500
• 2009-2020 GMC Savana 4500
• 1999-2013 GMC Sierra 1500
• 2001-2003 GMC Sierra 1500 HD
• 2005-2006 GMC Sierra 1500 HD
• 2007-2007 GMC Sierra 1500 HD Classic
• 1999-2004 GMC Sierra 2500
• 2001-2014 GMC Sierra 2500 HD
• 2001-2006 GMC Sierra 3500
• 2007-2007 GMC Sierra 3500 Classic
• 2007-2014 GMC Sierra 3500 HD
• 2000-2014 GMC Yukon
• 2000-2014 GMC Yukon XL 1500
• 2000-2013 GMC Yukon XL 2500
• 1998-2002 Pontiac Firebird
• 2008-2009 Pontiac G8
• 2005-2008 Pontiac Grand Prix
• 2004-2006 Pontiac GTO

Technical Documents

• 66277-HD-Gear-Reduction-Starter-Instructions.pdf