Pro Series Flexplate SFI 29.1 Pont 326-455

The Pro Series Flexplate SFI 29.1 Pont 326-455 by PRW Industries is a premium flexplate engineered for serious Pontiac performance builders working with big-block engines in the 326 to 455 cubic-inch range. This component sits between your engine's crankshaft and automatic transmission, absorbing harmonic vibration and providing critical damping that protects both drivetrain components during hard acceleration and high-RPM operation. Whether you're building a street machine, bracket racer, or restomod, a quality flexplate is non-negotiable for reliability and longevity.

PRW Industries engineered this flexplate to SFI 29.1 specifications, the industry safety standard that ensures proper dynamic balance and structural integrity under extreme load. The SFI certification guarantees the part has passed rigorous testing for maximum RPM capability and failure resistance—critical when running forced induction, nitrous, or radical cam profiles that generate substantial peak torque. The Pontiac-specific design accommodates the unique bolt pattern and rotating mass characteristics of Pont 326-455 engines, ensuring precise fit and optimal weight distribution for smooth operation at any engine speed.

This flexplate is ideal for enthusiasts replacing a worn original unit or upgrading during an engine refresh on Pontiac-powered vehicles from the muscle car era through modern restorations. Installation pairs with any manual or automatic transmission compatible with Pontiac's bellhousing, and proper balancing with your rotating assembly is essential for maximum effectiveness. At 7.95 lbs, the Pro Series delivers the durability and precision expected from PRW—a trusted name among engine builders and transmission shops who demand components that survive real-world abuse.