Pioneer Cables 871001 Automatic Transmission Flexplate

Pioneer 871001 SFI-Approved Flexplate

The Pioneer Cables 871001 automatic transmission flexplate is built for racing applications that demand consistent starter engagement and reliable drivetrain performance. It is made to original dimensions from high-grade steel, then precision balanced to factory specifications for a direct replacement in supported Chevrolet, GMC, Pontiac, Buick, and Oldsmobile applications.

With 168 teeth, a 14.125-inch outside diameter, and SFI approval, this flexplate is a fitment-focused solution for many classic GM performance and truck platforms. It is a strong match for buyers searching for a 168-tooth flexplate for Chevrolet Camaro, Corvette, Impala, El Camino, and GMC van or truck applications.

Key Features

• Part number 871001
• Automatic transmission flexplate for racing and performance use
• 168-tooth ring gear for starter engagement
• 14.125-inch outside diameter
• Built from high-grade steel to original dimensions
• Automated welding process for consistent strength
• Precision balanced to factory specifications
• SFI approved with certification sticker included
• 29.1 certification rating

Detailed Description

Pioneer Cables 871001 is an OE-style replacement flexplate engineered for automatic transmission applications where accurate fit and stable rotation matter. The plate uses a 168-tooth design, a 1.177-inch center diameter, and a 12-14 pitch flywheel specification. Its construction and balancing process are aimed at restoring factory-level performance in supported vehicles while meeting SFI certification requirements for racing use.

This flexplate is listed across a wide range of GM fitments, including Chevrolet Camaro, Corvette, Caprice, Impala, El Camino, Nova, C10, K10, P30, and GMC Jimmy, Safari, and van applications. It is also cataloged for several Pontiac and Buick models from 1967 through 1987, including Grand Prix, Firebird, Regal, Century, and LeMans variants. Because fitment varies by engine and transmission configuration, verify the notes for each vehicle before ordering.

This part cross-references Pioneer Automotive Industries 871001 for the same application.

What It Helps Address

• Cracked or warped flexplate surfaces
• Starter ring gear wear or damaged teeth
• Vibration caused by an out-of-balance flexplate
• Replacement needs for SFI-certified racing setups
• Fitment issues on GM automatic transmission performance builds

Installation Notes and Tips

• Confirm tooth count, outside diameter, and bolt pattern before installation.
• Match the vehicle notes carefully, especially THM350, THM400, lock-up, and balance-weight requirements.
• Inspect the starter, converter, and crankshaft flange for wear before installing the new flexplate.
• Use the application notes for your exact year, make, model, and engine combination.
• For racing use, verify that the vehicle configuration meets the listed SFI-certified application details.

Quality Assurance

Pioneer Cables builds this flexplate from high-grade steel, uses automated welding for consistency, and balances each unit to factory specifications. The 871001 is SFI approved and includes the SFI certification sticker.