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SKU: 613-1250 | UPC: 672036015893
ARP 3/8in x 16 - 1.25in UHL 12pt SS Bolt Kit (5/pkg)
This ARP bolt kit includes five 3/8"-16 thread x 1.25" under head length stainless steel bolts with 12-point heads, built for demanding engine applications such as exhaust headers, valve covers, and rocker arms. These fasteners provide consistent clamp load and resistance to fatigue in high-heat high-vibration environments found in street and race engines. Ideal for builders seeking dependable hardware that holds up over thousands of cycles.
Key Features
- Stainless Steel Build: Resists corrosion and maintains strength in harsh engine bay conditions for extended service life
- 12-Point Head Design: Enables secure wrench engagement for accurate high-torque application without rounding
- Precision-Rolled Threads: Delivers maximum thread strength and consistent torque retention across repeated installations
- 1.25in Under Head Length: Matches common engine component thicknesses for flush secure fitment
- 5-Piece Kit: Complete matched set simplifies ordering and ensures uniform performance
Product Notes
- Confirm thread size length and pitch match your specific component before purchase
- Pair with ARP washers if application requires added load distribution
- Packed in protective packaging for damage-free arrival
Installation Notes
- Professional installation recommended.
- Clean mating surfaces and threads apply ARP Ultra-Torque lubricant as specified
- Torque in proper sequence to ARP values recheck after heat cycles
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | Various | Performance Engines | Headers Valve Covers Rocker Arms |
| 1997-2013 | Chevrolet | Corvette Camaro | LS1 LS2 LS3 LS7 |
| 1969-1995 | Chevrolet | Small Block Engines | 350 383 Stroker Builds |
| 1996-2004 | Ford | Mustang | 4.6L Modular |
| 1970-1997 | Ford | Big Block Engines | 460 351W Headers |
Why Choose ARP?
- ARP sets the industry standard with fasteners proven in NHRA Top Fuel and NASCAR
- Every bolt undergoes rigorous testing for tensile strength and fatigue resistance
- US-made with exacting tolerances for repeatable results in pro engine builds
Frequently Asked Questions
-
Q: What applications do these bolts fit best?
A: Designed for exhaust headers valve covers rocker arm shafts and similar engine hardware requiring 3/8-16 x 1.25 UHL fasteners in GM Ford and other performance engines -
Q: What material and finish do they have?
A: Made from 300 series stainless steel with rolled threads for superior strength and natural corrosion-resistant finish -
Q: What torque specs should I follow?
A: Consult ARP installation sheet or application guide use Ultra-Torque lube and follow sequenced torque values typically 35-45 ft-lbs depending on component
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Compact protective box 4in x 3in x 1in
- Weight: 0.35 lbs
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