


The Ford 6.7L Powerstroke "Scorpion" engine is a modern marvel of diesel performance, but its high-torque output places immense stress on the rotating assembly. The connecting rod bolts are the most highly stressed fasteners in the entire engine, responsible for holding the rod caps in place against massive reciprocating forces. The ARP 250-6305 kit replaces the factory "torque-to-yield" hardware with proprietary ARP2000® alloy, providing a critical upgrade for any high-performance 6.7L build.
Whether you are pushing your truck with aggressive tuning, larger turbos, or heavy-duty towing, these bolts offer the structural integrity needed to prevent "big-end" distortion and catastrophic engine failure.
ARP2000® Super-Alloy: Heat-treated in-house to a tensile strength of 220,000 psi. This proprietary material is far superior to standard 8740 chrome moly and OEM hardware, offering a massive increase in clamping force and fatigue life.
Prevent Rod Cap Walk: High combustion pressures and high RPMs can cause rod caps to shift or "walk," leading to bearing failure. These bolts provide the extreme clamping load required to lock the caps securely to the rod.
Cold-Forged & Thread-Rolled: ARP rolls the threads after the heat-treatment process. This specific manufacturing sequence provides roughly 10x the fatigue resistance of bolts threaded before hardening—a must for high-stress diesel applications.
Superior Torque Accuracy: Unlike factory bolts that are designed to stretch permanently (TTY), ARP2000 bolts provide a consistent, repeatable preload, ensuring the rod's "big end" remains perfectly round under load.
Direct Fitment: Specifically engineered for the factory (OEM) connecting rods in the 2011 to present Ford 6.7L Powerstroke engine.
The 6.7L Powerstroke features a "fracture-split" (cracked) connecting rod design. This manufacturing process creates a unique, keyed mating surface between the rod and the cap, but it relies entirely on the fastener to maintain that alignment. Factory bolts are designed for stock power levels; however, when you increase the "cylinder pressure" via tuning, the factory bolts can stretch beyond their elastic limit.
The ARP 250-6305 kit is the ultimate insurance policy for your Scorpion engine. By installing competition-grade hardware, you ensure that your rotating assembly stays together even during the most violent combustion events. It is the gold standard for owners who demand 100% reliability from their 6.7L build.
Professional Note: When installing high-strength rod bolts, it is highly recommended to have a professional machine shop check the big-end bores for roundness. Because the ARP2000 bolts apply a higher clamping force than factory hardware, the rod bores may require resizing to ensure perfect bearing clearances.
PLEASE READ AND FILL OUT THE WARRANTY REGISTRATION FORM TO ACTIVATE THE WARRANTY.

Supplied with every engine is a complete copy of our warranty with an attached warranty registration form. This form can also be found here. Once filled out:
Then email a copy of each document within 45 days from the time of purchase to warranty@choateperformance.com. You should also retain a copy for your records as it may be required to assist with a warranty concern.
MODEL C STANDARD WARRANTY
1 Year / Unlimited Miles

THIS WARRANTY IS WITH THE PURCHASE OF THE INSTALLATION PACKAGE AND IS FOR THE ENGINE/WORKMANSHIP ONLY. NO LABOR PAYOUTS.
EXTENDED COMMERCIAL WARRANTIES ARE NOT AVAILABLE ON WORKHORSE, CASSQUATCH RACE SERIES, OR MODEL C ENGINES.
Remanufactured Heads — 6 Months
PARTS ONLY

Cylinder heads are warranted to be free from defects in material and workmanship. This warranty does not cover cylinder heads that are damaged due to improper installation, overheating, abuse, or accident.
Short Block Engines

Warranty coverage for Short Block engines does not include labor payout. We do not cover fluid leaks on any Short Block builds.
DAILY DRIVER WARRANTY
5 Year / 100,000 Miles

THIS WARRANTY IS NOT A FULL COVERAGE WARRANTY. PLEASE REVIEW YOUR WARRANTY CAREFULLY.
Labor rate for PREFERRED DEALER ONLY is a higher shop rate using Mitchell flat rate time.
WORKHORSE SERIES ENGINE
5 Year / 100,000 Miles

THIS WARRANTY IS NOT A FULL COVERAGE WARRANTY. PLEASE REVIEW YOUR WARRANTY CAREFULLY.
Labor rate for PREFERRED DEALER ONLY is a higher shop rate using Mitchell flat rate time.
YOUR CASSQUATCH RACE ENGINE
6 Months / 3,000 Miles
PARTS ONLY

THIS WARRANTY IS NOT A FULL COVERAGE WARRANTY. PLEASE REVIEW YOUR WARRANTY CAREFULLY.
CHOATE ENGINEERING PERFORMANCE COMMERCIAL WARRANTY
1 Year / 20,000 Miles

THIS WARRANTY IS NOT A FULL COVERAGE WARRANTY. PLEASE REVIEW YOUR WARRANTY CAREFULLY.
Labor rate for PREFERRED DEALER ONLY is a higher shop rate using Mitchell flat rate time.
CHOATE ENGINEERING PERFORMANCE EXTENDED COMMERCIAL WARRANTY
3 Year / 60,000 Miles

THIS WARRANTY IS NOT A FULL COVERAGE WARRANTY. PLEASE REVIEW YOUR WARRANTY CAREFULLY.
WARRANTY COVERAGE DETAILS
This warranty will cover remanufactured Short and Long-Block engines that are built by Choate Engineering Performance unless otherwise stated. From this page on, engines will be referred to as “unit(s)” and/or “engine(s)” unless otherwise stated. Fuel pump, injectors, and turbo warranties, and warranties on all accessories, are covered by the supplying manufacturer’s warranty.
FOR PREFERRED DEALERS ONLY: LABOR RATE IS SET AT A HIGHER RATE PER HOUR UP TO A MAXIMUM OF $2,500, NO EXCEPTIONS.
THE LIMITED WARRANTY WILL BE VOID AND WILL NOT APPLY TO DEFECTS OR FAILURES CAUSED BY THE FOLLOWING:
BUYER ALSO ACKNOWLEDGES THAT PROPER MAINTENANCE PROCEDURES ARE REQUIRED TO KEEP THE UNIT IN PROPER WORKING ORDER. CHOATE ENGINEERING PERFORMANCE WILL NOT ASSUME ANY RESPONSIBILITY FOR THE COST OF THIS ROUTINE MAINTENANCE.
Buyer acknowledges the following:
This warranty will not cover damages caused by the following for remanufactured engines:
Choate Engineering Performance limited warranty will end after the expiration of time or mileage from the date of the original invoice. Any repairs or replacements will not extend the warranty. The buyer shall be responsible for all defects thereafter, regardless of cause. Choate Engineering Performance limited warranty is in lieu of all other warranties expressed or implied.
The buyer agrees Choate Engineering Performance will not be responsible for:
TO QUALIFY FOR THE 5 YEAR / 100,000 MILE WARRANTY YOU MUST FOLLOW ALL INSTRUCTIONS AND REPLACE ALL PARTS SPECIFIED.
THIS WARRANTY IS TRANSFERABLE THROUGH PRIVATE SALE AND CHANGE OF OWNERSHIP ONLY ONCE IF CERTAIN CRITERIA ARE MET.
CHOATE ENGINEERING PERFORMANCE LIMITED WARRANTY FOR THE WORKHORSE AND CASSQUATCH SERIES ENGINES IS IN ADDITION TO ALL ITEMS LISTED IN THE STANDARD WARRANTY PACKAGE AND SUPERSEDES ALL MILEAGE REQUIREMENTS.
The Limited Warranty specifically does not cover the following:
FREIGHT / SHIPPING CHARGES

CHOATE ENGINEERING PERFORMANCE SHALL NOT BE RESPONSIBLE, NOR SHALL IT PAY ANY FREIGHT/SHIPPING CHARGES.
ADDITIONAL INFORMATION

As consideration for the above warranties, the buyer agrees they will take no action, statement, characterization, or implication regarding Choate Engineering Performance that may in any manner be interpreted as disparaging to Choate Engineering Performance or the reputation of Choate Engineering Performance. Any violation of this is a material breach, entitling Choate Engineering Performance to void any warranty.