2008-2010 FORD 6.4L POWER STROKE HIGH QUALITY AFTERMARKET CYLINDER HEAD STUDS 250-4203A
These high-quality aftermarket cylinder head studs are engineered to provide exceptional clamping force for the 2008–2010 Ford 6.4L Power Stroke. The factory head bolts on the 6.4L engine are known to stretch under elevated cylinder pressures, contributing to head gasket failures, coolant loss, white smoke, and reduced reliability. Upgrading to premium head studs ensures improved durability, better long-term sealing, and increased resistance to high-boost applications. Whether performing routine repairs or building a performance-capable 6.4L, these studs offer strength, stability, and confidence.
What’s Included in the Kit
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Complete set of cylinder head studs
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Hardened washers
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High-strength nuts
Features & Benefits
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Increased clamping force over OEM head bolts
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Improved head gasket sealing under high load and boost
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Heat-treated, premium alloy steel construction for long-term strength
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220,000 PSI tensile strength
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Helps reduce the risk of head gasket failures
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Ideal for stock or performance-enhanced 6.4L Power Stroke engines
Compatibility
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2008 Ford 6.4L Power Stroke
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2009 Ford 6.4L Power Stroke
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2010 Ford 6.4L Power Stroke
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Fits Ford Super Duty F-250, F-350, F-450, and F-550 equipped with the 6.4L diesel engine
These studs offer a reliable solution for maintaining engine integrity and preventing costly repairs associated with head gasket leakage.
Shipping Disclaimer
✔️ We ship via USPS, UPS, and FedEx.
✔️ Carrier selection is based on package size, weight, and destination.
✔️ Expedited shipping options available, call to check freight options
✔️ Orders are processed within 1 business day (Monday–Friday).
✔️ Orders placed on weekends or holidays will be processed on the next business day.
✔️ Tracking information will be provided once the item ships.
✔️ Shipping to PO Boxes, APO/FPO may be limited based on carrier restrictions.
California Proposition 65 Warning
This product contains chemicals known to the State of California to cause cancer and reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
Installation Method for Head Stud Kit
Part Number – 250-4203 Application – Ford 6.4L Power Stroke Diesel
1. Clean and inspect all hardware prior to installation. Look for obvious defects or shipping damages, plus proper fit, length and dimension.
2. To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block. Use a thread chaser if necessary
3. If the cylinder head studs protrude into a water jacket, lubricate the block threads of the studs with a thread sealant. This will protect against rust, leaks and loosening from vibration.
4. Screw studs into the block “HAND TIGHT ONLY!!” – Note: Loctite may be used IF a PERMANENT MOUNTING of the studs is preferred. The FASTENERS, however, must be torqued PROIR to the Loctite setting up
5. Install the cylinder head(s) and check for binding or misalignment.
6. Lubricate the stud threads, nuts and washers with high-quality lubricant such as ARP Ultra-Torque Fastener Assembly Lubricant. Do NOT use motor oil as a lubricant!! This is due to higher friction on the studs as well as inconsistencies in the clamping force of the fasteners when motor oil or low quality lubricants are used.
Preload (Torque) Recommendations
7. Following the manufacturers recommended torque sequence tighten the nuts to the following specification with lubricant
Step 1 – Tighten studs 1 thru 10 to 90 ft-lbs.
Step 2 – Tighten studs 1 thru 10 to 180 ft-lbs.
Step 3 – Final tighten studs 1 thru 275 ft-lbs.
Step 4 – Tighten M8 bolts 11 thru 15 to 25 ft-lbs.
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California Proposition 65 Warning: Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm.
Visit: www.p65warnings.ca.gov
