81.5m ring compressor

81.5m ring compressorMaterial: Aluminum Finish: Black Anodized Material 2: Finish 2: Origin: USA

Most applicationshave undercut short bolts that can help eliminate head gasket failures through providing more “stretch” to compensate for theadditional compression of gaskets

Made of corrosion resistant stainless steel

Studs and bolts come either black oxide chrome moly or polished ARP Stainless

High Performance head bolts are available with a reduced wrenching hex or 12-point and wide area flanged head that eliminates theneed for valve train removal to facilitate cylinder head retorquing

An extralarge radius base offers greater resistance to flex

square drive forged into bolt head

which is substantially stronger than the OEM bolts

NOTE: Not to be used with OEM-style

That’s whythe fastener experts at ARP have developed special bolts that are far superior to OEM hardware

All Pro Series head bolts have areduced wrenching hex or 12-point head and wide area flange to permit the use of larger diameter valve springs and eliminate theneed for valve train removal during cylinder head retorquing

000 psi tensile strength material and proprietary (ARP2000®) 220

enabling the rotationof an engine with any 1/2