Manley ARP 3/8" Custom Age 625+ Replacement Connecting Rod Bolts 1.500" UHL 42320-4

Manley Rod Bolt Recommended Torque w/Manley Lube: 55 ft./lbs.
Recommended Rod Bolt Stretch w/Manley Lube: .0063"-.0067"
Manley ARP 3/8" Custom Age 625+ Replacement Connecting Rod Bolts 1.500" UHL set of 4.

The "weak link" in a connecting rod has always been the bolt, and racers know that nobody builds a better bolt than ARP. However, it is critically important to monitor the stretch of each bolt and replace it when it has permanently elongated by .001"


CUSTOM AGE 625 PLUS®: This newly formulated super-alloy demonstrates superior fatigue cycle life, tensile strength and toughness – with complete resistance to atmospheric corrosion and oxidation. ARP is the first to develop manufacturing and testing processes for fasteners with Custom Age 625+. Best of all it is less expensive and expected to soon replace MP-35 as the material of choice in the high strength, super-alloy field. Typical tensile strength is 260,000-280,000 psi.