Cylinder Head Bolt Kit for Oldsmobile 307-350-403-455 cid (1977 & later) 1/2˝

Cylinder Head Bolt Kit for Oldsmobile 307-350-403-455 cid (1977 & later) 1/2˝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. All High Performance Series bolts are 180,000 psi (which is 15%stronger than Grade 8) and kits come complete with hardened parallel ground washers. Material: 8740 Chrome Moly Finish: Black Material 2: Finish 2: Origin: USA

and copy down the length of the fastener prior to and after installation

reciprocating and valve train components

This procedureinvolves about ten very slight cuts and results in an exceptionallystraight part

000 psi tensile strength material where noted

000 psi and precision machined for optimum thread engagement

They are both forged from aerospace alloy and heat-treated prior to thread rollingand machining

Measure the fastener prior to starting

The stainless has the added advantage of being rust and corrosion resistant

marine and drag racing engines – including those with superchargers and/ or nitrous oxide injection systems – ARP offers replacement rod bolts in three different models

They’re made from premium grade aerospace chrome moly and centerless ground to precise diameter

They’re nominally rated at 180

Those first moments an engine runs prior to building oil pressure are when damage can easily occur