ARP 134-3601 Head Bolt Kit for CHEVROLET Small Block hex ymm_26 75˝ Thread Diameter-Pitch 1/4-20 Grip

75˝ Thread Diameter-Pitch 1/4-20 Grip Diameter 1/4˝ Wrenching 5/16˝ Head Height 0

digital LED display and sweeping LED “needle” that changes colors as AFR changes from rich to lean

Fits Following Engines: 409 CID Chevy Big Block V8

Our World-famous Wideband O2 air/fuel ratio UEGO gauge features a digital LED display and sweeping LED 'needle' that changes colors as AFR changes from rich to lean

Fits Following Engines: 265 CID Chevrolet Small Block Generation I

ARP 134-3601 Head Bolt Kit for CHEVROLET Small Block hex ymm_26 75˝ Thread Diameter-Pitch 1/4-20 GripSpecifications Socket Size(s) 1 2 hex Finish: Black oxide Material: 8740 Chrome Moly Quantity: Kit Kit Instructions