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SKU: 300-8338 | UPC: 672036012403
ARP M12 X 1.25 12pt Nut Kit Small Collar (Pack of 10) Honda K-Series Subaru WRX STI
ARP M12 x 1.25 12-point nut kit with small collar includes 10 nuts designed for high-performance engine fasteners fits Honda K20 K24 engines in Civic Si RSX Accord and Subaru EJ25 in WRX STI Impreza. These nuts secure ARP head studs and rod bolts with consistent clamp load to handle boost and high RPM. Built for racing and street use with exact thread match and collar height for flush seating.
Key Features
- 12-Point Design: Provides secure wrench engagement to prevent rounding during high-torque installs
- Small Collar: Ensures proper alignment and contact on ARP studs for even load distribution
- M12 x 1.25 Threads: Precision rolled for smooth engagement and resistance to vibration loosening
- ARP Pro Series Construction: Forged from high-strength steel heat treated for extreme tensile loads over 200 000 psi
- Pack of 10: Complete set matches most ARP head stud kits for one engine build
Product Notes
- Inspect studs for thread damage before assembly
- Store in dry area to prevent corrosion
- Compact packaging protects components during transit
Installation Notes
- Professional installation recommended.
- Clean all threads and apply ARP Ultra-Torque fastener lubricant
- Torque to ARP specs typically 65-75 ft-lbs in sequence re-check after 100 miles
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2006 | Acura | RSX | Type-S K20A2 |
| 2006-2011 | Honda | Civic Si | FG2 FA5 K20Z3 |
| 2002-2008 | Honda | Accord | K24A4 |
| 2007-2016 | Honda | CR-Z | K20Z3 |
| 2004-2009 | Subaru | Impreza WRX STI | GD GD EJ257 |
| 2002-2007 | Subaru | Impreza WRX | GD EJ205 EJ255 |
| 1990-2001 | Acura | Integra | GS-R Type R B18C |
| 1992-2000 | Honda | Civic | Si EX B16A2 |
Why Choose ARP?
- Trusted by NHRA Top Fuel teams for decades
- Custom alloys outperform standard hardware under heat and stress
- CNC machined threads for repeatable accuracy
Frequently Asked Questions
-
Q: Will these nuts fit ARP head studs on Honda K20 engines?
A: Yes direct replacement for ARP 206-4701 K-series kit and similar with M12x1.25 studs small collar matches OEM ARP design -
Q: What material are the nuts made from?
A: Forged ARP Pro Series steel with proprietary heat treatment for 220 000 psi tensile strength resists fatigue in boosted applications -
Q: What is the torque spec and warranty?
A: Follow ARP specs 70 ft-lbs with Ultra-Torque backed by ARP limited defect warranty against breakage
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Protective plastic pouch in 6 x 4 x 1 inch box
- Weight: 0.31 lbs
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