SKU: 300-8337 | UPC: 672036012397
ARP M12 X 1.25 12pt Nut Kit (Pack of 10) for Honda K-Series Toyota 2JZ-GTE Subaru EJ
ARP M12 x 1.25 12-point nut kit contains 10 high-strength nuts designed for ARP head studs and rod bolts in performance engines. Fits Honda K20 K24 Toyota 2JZ-GTE Subaru EJ25 Mitsubishi 4G63 applications for secure fastening during engine builds. These nuts ensure even clamp load and resist fatigue in high-horsepower street and track setups.
Key Features
- 8740 Chromoly Construction: Forged steel heat-treated to 200000 PSI tensile strength for extreme durability under boost and high RPM
- 12-Point Design: Thin-wall 12-point head allows high torque application in tight spaces with positive engagement
- Black Oxide Finish: Provides corrosion resistance and reduced friction for accurate torquing and long service life
- Precise Thread Fit: M12 x 1.25 threads match ARP Pro Series studs perfectly without galling or cross-threading
- Pack of 10: Complete quantity for most cylinder head or connecting rod applications with spares for builds
Product Notes
- Inspect studs for thread damage before nut installation to prevent stress risers
- Store in dry conditions to maintain black oxide protection
- Lightweight design ships compact without added handling fees
Installation Notes
- Professional installation recommended.
- Clean all threads thoroughly and apply ARP Ultra-Torque lubricant on nut threads and underside
- Torque to ARP-specified values in sequence then recheck after 100 miles or heat cycles
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2006 | Acura | RSX | Type-S (K20A2) |
| 2006-2011 | Honda | Civic | Si (K20Z3) |
| 2005-2016 | Honda | CR-V | All (K24) |
| 2007-2013 | Honda | Fit | Sport (K20Z4) |
| 1993-1998 | Toyota | Supra | Turbo (2JZ-GTE) |
| 2004-2021 | Subaru | Impreza | WRX STI (EJ25) |
| 1989-2015 | Mitsubishi | Lancer Evolution | All (4G63) |
| 1999-2002 | Nissan | Skyline GT-R | R34 (RB26DETT) |
Why Choose ARP?
- Decades of motorsport fastener innovation trusted by NHRA and Formula teams
- Engineered for 50% higher preload than OEM hardware in dyno-tested conditions
- Made in USA with exact tolerances to prevent stud stretch or failure
Frequently Asked Questions
- Q: Does this kit fit ARP head studs for K-Series engines?
A: Yes ARP 206-4307 and similar K20 K24 kits use these exact M12 x 1.25 nuts for cylinder head installation - Q: What material and strength rating?
A: Forged 8740 chromoly steel heat-treated to 200000 PSI tensile strength with black oxide finish - Q: What warranty applies and installation support?
A: Limited lifetime warranty against defects ARP provides torque specs and tech support via website or 800-826-3045
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: ARP retail box 3.75 x 2.75 x 1.25 inches
- Weight: 0.15 lbs
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