Big End Performance 34004 SFI Flexplate BBC External Balanced 168 Tooth

The Big End Performance 34004 is an SFI-29.1 certified flexplate designed specifically for 1965-1988 Big Block Chevrolet engines with 2-piece rear main seals and external balance configurations. This heavy-duty flexplate features a 168-tooth ring gear with a 14.13-inch diameter, making it compatible with torque converters using either 10.75-inch or 11.5-inch bolt patterns.

Key Features:

• SFI-29.1 approved for NHRA and IHRA drag racing classes requiring certified flexplates
• 168-tooth ring gear design for reliable starter engagement
• Dual converter bolt pattern (10.75-inch and 11.5-inch) for versatile torque converter compatibility
• Constructed 0.35-inch thicker than stock flexplates for enhanced durability
• Zinc-plated finish for superior moisture resistance and corrosion protection
• 6-bolt crankshaft attachment pattern
• External balance configuration for Big Block Chevy Mark IV engines (454/7.4L)

This flexplate is engineered to meet the demanding requirements of high-performance and racing applications while maintaining compatibility with automatic transmissions. The SFI certification ensures this component meets strict safety standards for competitive motorsports use.