Oliver Rods Engine Connecting Rod Bolt
Representative Photo, actual item may vary
Oliver Rods Connecting Rod Bolts: The Fastener Behind the Force
When an engine is spinning at race-level RPM, the connecting rod bolt is one of the most critically loaded fasteners in the entire powertrain. It must maintain precise clamping force through extreme heat cycles, brutal combustion loads, and the relentless stretch-and-recover demands of a high-performance rotating assembly. Oliver Racing Parts — widely regarded as one of the finest connecting rod manufacturers in the world — takes the same exacting philosophy that defines its rods and applies it directly to the bolts that hold them together.
Custom-Engineered in Partnership with ARP
ARP has been the key supplier to Oliver, providing the highest quality connecting rod bolts for the last 20 years. This is not an off-the-shelf arrangement. All Oliver bolts are custom designed to Oliver's specifications and meet the exacting AS9100/ISO9001 standards of ARP. That means every bolt in this lineup is engineered specifically around the geometry, clamping requirements, and load profiles of Oliver's own connecting rods — not adapted from a generic catalog offering.
Oliver offers its connecting rod bolts across several high-strength alloy grades to match the demands of different racing applications. The available material grades include ARP2000, L19, and the ultra-premium CA 625+ alloy. All bolts are custom designed to Oliver's specifications and meet ARP's AS9100/ISO9001 standards, with ARP 3.5 and 625 grades designed to ultra-high standards exceeding 260 min tensile strength. This tiered approach lets engine builders select the fastener that matches their power level and application — whether that's a naturally aspirated circle-track motor or a forced-induction drag racing powerplant pushing over 1,500 horsepower.
Bolt Specifications and Product Options
Oliver's replacement rod bolt lineup centers on a 7/16-inch diameter with a 1.400-inch underhead length, featuring an E-head style suited to Oliver's rod cap counterbore design. Available options include replacement E-head style bolts in 7/16-inch thread size, offered in both ARP2000 alloy and L19 alloy, each at 1.400-inch underhead length. The CA 625+ variant provides the highest clamping capability in the lineup, making it the preferred choice for maximum-effort builds where bolt stretch and clamping consistency are mission-critical.
Proper Installation Is Part of the System
Oliver treats bolt installation as an engineering discipline in itself. The stretch method has become widely accepted as the most accurate method of obtaining proper clamping force, and Oliver provides detailed bolt installation instructions to guide builders through torque-angle and stretch procedures. The torque-angle method has proven to be one of the most effective methods to assure against premature failure within the fastener's load capacity. This level of technical transparency reflects Oliver's broader commitment to engine builders — giving them not just a precision component, but the knowledge to install it correctly.
The Oliver Standard
Oliver's rod designs have been refined with feedback from the world's best engine builders racing everywhere from the biggest NASCAR venues to local dirt tracks all over the U.S. and around the world. That same real-world race feedback shapes every fastener specification in their bolt lineup. Oliver connecting rods are made in America, from 100% American materials. The bolts that accompany them are held to the same national standard of quality.
Whether you are replacing worn fasteners on an existing Oliver rod set or upgrading to a higher-spec alloy for a more aggressive build, explore the full selection of Oliver Rods engine connecting rod bolts and find the right fastener for your engine combination.