Sold out
HKS RADIATOR CAP  N-type - Black Ops Auto Works
HKS RADIATOR CAP  N-type - Black Ops Auto Works
Click to zoom in

HKS RADIATOR CAP N-type

HKS
HKS15009-AK005
4957266655610
Radiator Caps
Out of stock
Cooling, Engine, HKS, Radiator Caps
$ 30.00

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)

Request For Information

Have questions about HKS RADIATOR CAP N-type? Fill out the form below and we'll get back to you by the next business day.
Cooling

Cooling

Cooling system parts and accessories for HEMI, Hellcat, Trackhawk, Duramax, Cummins, and import performance builds are stocked at Black Ops Auto Works. Shop radiators, thermostats, thermostat housings, water pumps, coolant reservoirs, expansion tanks, radiator hoses, oil coolers, transmission coolers, fans and shrouds, and thermal wrap for street, track, towing, and diesel platforms. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 2116 Cooling SKUs across radiator, thermostat, water pump, hose, and heat management categories. What This Category Covers The Cooling category groups together every part that keeps engine, transmission, and charge air temperatures in check under real driving load. Coverage spans aluminum performance radiators, billet thermostat housings, high flow water pumps, silicone radiator hose kits, coolant reservoirs and expansion tanks, oil and transmission co...

View Cooling Products
Engine

Engine

Engine parts and engine bay upgrades for Dodge, Jeep, RAM, Chrysler, Chevrolet, Ford, Toyota, Nissan, Subaru, and Honda vehicles are stocked at Black Ops Auto Works. Shop oil catch cans, supercharger pulleys, thermostats, radiators, cooling parts, throttle bodies, intake manifolds, headers, ignition coils, spark plugs, sensors, gaskets, fuel pumps, valve covers, engine covers, billet cap covers, and full engine bay dress-up parts for HEMI, Hellcat, Trackhawk, Redeye, Demon, Scat Pack, RAM TRX, LS, LT, Coyote, EcoBoost, K-Series, and 2JZ builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 14,298 engine SKUs across performance, cooling, oil control, ignition, and appearance categories. What This Category Covers The Engine collection combines OEM-replacement engine service parts with performance aftermarket upgrades for supercharged, turbocharged, and naturally aspirated builds...

View Engine Products
HKS

HKS

HKS Japanese performance parts for Toyota Supra, Nissan Skyline GT-R, Nissan Silvia and 240SX, Subaru WRX and STI, and other JDM platforms are stocked at Black Ops Auto Works. Shop turbo kits, cat back exhaust systems, coilovers, blow off valves, and engine management upgrades for RB26DETT, SR20DET, 2JZ-GTE, and EJ series turbocharged engines. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 607 HKS SKUs across forced induction, exhaust, suspension, and engine management categories. What This Collection Covers HKS has built its reputation on Japanese sport compact and sports car performance since the late 1970s, developing turbo kits, exhaust systems, and suspension for platforms including the Toyota Supra 2JZ-GTE, Nissan Skyline GT-R RB26DETT, Nissan Silvia and 240SX SR20DET, and Subaru WRX and STI EJ and FA series engines. This collection brings together fitment verified HKS pa...

View HKS Products
Radiator Caps

Radiator Caps

Radiator Caps parts and accessories for Silverado, F 150, Mustang, Camaro, Civic, WRX, BRZ, Toyota 86, 350Z, Duramax and Cummins applications are stocked at Black Ops Auto Works. Shop high pressure caps, 13 psi caps, 16 psi caps, 20 psi caps, 22 psi caps, coolant tank caps, safety release caps, radiator cap seals, Type A caps and Type S caps for street cars, trucks, turbo imports, domestic performance builds and racing cooling systems. Every product is filterable by year, make, model, trim, engine and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 40 Radiator Caps SKUs across pressure ratings, neck types, cap depths, seal styles and vehicle specific cooling system requirements. What Radiator Caps Cover A radiator cap seals the cooling system and maintains the designed pressure range as coolant temperature changes. This collection includes replacement, high pressure, safety release and billet coolant tank cap options. Pressure control for the co...

View Radiator Caps Products
Military & First Responder Discounts

Military & First Responder Discount Program

Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

Learn More & Apply

Your cart

×