SKU: 15009-AK005 | UPC: 4957266655610
HKS RADIATOR CAP N-type Universal Fit for JDM Performance Cars
The HKS Radiator Cap N-type delivers 1.15 kgf/cm² release pressure to raise coolant boiling point and maintain cooling efficiency during high-load driving. This cap fits standard JIS D5302 radiator necks on popular JDM vehicles like Subaru Impreza WRX STI Nissan 240SX Silvia and Toyota MR2 Supra. It prevents overheating in modified engines by sustaining higher system pressure for consistent performance.
Key Features
- 1.15 kgf/cm² Release Pressure: Raises boiling point approximately 3°C over stock caps to reduce cavitation and improve heat dissipation under boost
- JIS D5302 Compatible Neck: Direct replacement for narrow neck radiators on most Japanese vehicles ensuring secure seal and no leaks
- Brass and Aluminum Construction: Corrosion-resistant materials endure high temperatures and harsh coolant environments for long service life
- Precision Valve Design: Reliable pressure regulation prevents premature cap failure during track or street use
- Lightweight at 80g: Minimal added weight maintains vehicle balance while enhancing cooling system reliability
Product Notes
- Verify radiator neck conforms to JIS D5302 standard before purchase
- Pair with high-performance coolant for maximum temperature control
- Compact packaging measures 4 x 3 x 2 inches for easy storage and shipping
Installation Notes
- Professional installation recommended.
- Drain coolant partially before removal to avoid spills
- Hand-tighten cap securely no special tools required torque to spec if using wrench
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1993-2021 | Subaru | Impreza | WRX STI |
| 1989-1998 | Nissan | 240SX | S13 S14 |
| 1995-2002 | Nissan | Silvia | S15 |
| 1986-1992 | Toyota | MR2 | Turbo |
| 1993-1998 | Toyota | Supra | Twin Turbo |
| 1990-2005 | Mitsubishi | Eclipse | GSX |
| 2003-2009 | Nissan | 350Z | All |
Why Choose HKS?
- Motorsport-proven design from decades of JDM racing development
- High-quality materials built for extreme temperature and pressure demands
- Engineered in Japan for exact fit and reliable operation in tuned setups
Frequently Asked Questions
- Q: Will this cap fit my Subaru WRX radiator?
A: Yes it fits 1993-2021 Impreza WRX STI models with standard JIS D5302 neck along with most factory or aftermarket radiators - Q: What materials are used in construction?
A: Brass valve assembly and aluminum body provide strength and corrosion resistance against ethylene glycol coolants - Q: Is installation straightforward and what warranty applies?
A: Direct replacement takes minutes with basic tools HKS offers 1-year manufacturer warranty against defects
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Secure box 4 x 3 x 2 inches
- Weight: 0.18 lbs (80g)
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