CAT C15/C16/3406 Riffled Connecting Rod | PDI

PDI Rifled Connecting Rod – CAT C15, C16 & 3406E

Available For: CAT C15, CAT C16, CAT 3406E

Warranty: 1-Year Unlimited Mile Warranty

• Rifled oil passage machined through the rod to carry oil up to the piston instead of relying on the cooling nozzle alone
• Industry-exclusive design — no other aftermarket connecting rod supplier offers this feature
• Improved oil control under load — more than a splash
• Built for high-horsepower builds in non-ACERT C15 and C16 blocks
• Precision machined to tight tolerances for proper balance and fitment
• Drop-in replacement for standard CAT C15, C16, and 3406E applications

A lot of builders favor the CAT C15 ACERT connecting rod because it uses a rifled hole through the rod that pushes more oil to the piston, rather than leaving that job entirely to the cooling nozzle. PDI has now brought that same technology to a connecting rod for the CAT C15, C16, and 3406E, making it a strong choice for anyone assembling a high-horsepower C15 or C16 in a non-ACERT block.

Traditional connecting rods have gone largely unchanged for decades, depending on splash or a basic oil feed to keep the assembly lubricated. PDI's rod adds a precision-machined internal oil rifling hole that improves how oil is distributed inside the rod during operation. That controlled oil movement helps hold a more consistent lubrication film under load — the condition that matters most in high-stress and high-mileage applications.

Connecting rods are among the most heavily loaded components in a diesel engine. Instead of only chasing rod strength, PDI looked at how oil behaves inside the rod and built the passage design around that. Every PDI connecting rod is engineered around real-world engine demands, and this rifled design reflects PDI's approach of going past standard replacement parts.