Gm Ls Head Bolt Kit Even Size 12 Point 2004 & On Air 6:1 to 18:1 AFR Range

6:1 to 18:1 AFR Range for Alternate Fuel Types

Proflow offer replacement electronic sensors that meet and/or exceed OEM specifications for performance

UHL 50mm Titanium Bolt

Core Height - 445mm

Part Number: AF111-021-2M

Gm Ls Head Bolt Kit Even Size 12 Point 2004 & On Air 6:1 to 18:1 AFR RangePart Number: AF37 2125 Aeroflow performance head bolts greatly improve your cylinder head to block sealingcompatibilities. This is important in engines with highpower adders such as turbochargers, superchargers or nitrous. They can even be agreat addition to a mildly modified build as insurance against failure. these head bolts are manufactured from aircraft quality 8740 high tensile strength chromolysteel and cold forged to ensure molecular integrity