Product Description
The ARP 250-4302 Head Stud Kit uses Custom Age 625+ alloy—engineered for extreme cylinder pressures—delivering a typical tensile strength near 260,000 psi for reliable head gasket sealing on hard-working and high-boost 2011–2016 Ford 6.7L Powerstroke builds. Expect repeatable clamp load, premium hardware, and race-proven durability.
Built to ARP’s exacting standards, this kit includes precision-ground studs, 12-point nuts, parallel-ground washers, and ARP Ultra-Torque assembly lube for consistent torque and clamp. For stock to compound-turbo applications, it’s the go-to upgrade when reliability matters.
Why Choose 625+ for Your 6.7L?
- Custom Age 625+ metallurgy for superior fatigue life and toughness.
- Nominal 260,000 psi tensile strength to combat head lift under boost.
- Centerless-ground studs, heat-treated prior to thread rolling for strength and precision.
Recommended ARP Add-Ons
- ARP 250-4301 Standard Head Stud Kit (great for moderate builds): Shop ARP 250-4301
- ARP Ultra-Torque Assembly Lube 1.69 oz: ARP 100-9909
- ARP Ultra-Torque Assembly Lube 20 oz (shop supply): ARP 100-9911
- Browse all ARP at CPP Diesel: ARP Brand Page
Fitment
- Ford Powerstroke 6.7L Diesel — 2011, 2012, 2013, 2014, 2015, 2016 model years.
What’s In The Box
- (36) Custom Age 625+ head studs
- (9) M8 ARP2000 studs
- (45) 12-point nuts
- (45) parallel-ground washers
- (1) 1 oz. ARP Ultra-Torque fastener assembly lubricant
FAQ
Q: Do I need ARP Ultra-Torque when installing these studs?
A: Yes—use ARP Ultra-Torque on threads and under nut bearing surfaces for accurate clamp load and to prevent galling.
Q: How much power/boost can 625+ handle?
A: Custom Age 625+ studs are widely used in high-boost diesel builds thanks to ~260,000 psi tensile strength; they’re chosen when cylinder pressures exceed what standard head studs reliably hold.
Q: Can I re-torque on a hot engine?
A: ARP advises against re-torquing on a hot engine; allow it to cool before any torque checks.
Q: What’s the difference between ARP 250-4302 and 250-4301?
A: 250-4302 uses Custom Age 625+ material for maximum strength; 250-4301 is the standard head stud kit for the same platform and suits moderate builds. Compare here.
Cross-Reference ARP Items (CPP Diesel)
| Brand | ARP (Automotive Racing Products) |
|---|---|
| Part Number | 250-4302 |
| Material | Custom Age 625+ (studs); ARP2000 (M8 studs) |
| Tensile Strength | ~260,000 psi (typical) |
| UPC | 672036049188 |
| GTIN-14 | 00672036049188 |
| Shipping Info | Shipping calculated at checkout; package dims approx. 8 x 4 x 10 in (per CPP listing) |
| Cross Reference | ARP 250-4301, ARP 100-9909, ARP 100-9911 |
| E-Codes | Not applicable (fastener kit) |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
