Koyo N-FLO Radiator - 1989-1994 Nissan 180SX/Silvia S13 SR20DET (MT Dual Pass)

Upgrade your S13's cooling system with the Koyo N-FLO dual pass radiator. Designed specifically for 1989-1994 Nissan 180SX and Silvia S13 with SR20DET engine and manual transmission, this high-performance radiator features 36mm core thickness and dual pass design for superior cooling capacity. Essential for turbocharged builds, track use, and aggressive street driving.

Key Features:

• Dual pass design for improved cooling efficiency
• 36mm core thickness for increased capacity
• Direct fit for S13 SR20DET manual transmission
• All-aluminum construction for weight savings
• Improved cooling over factory radiator
• Track-proven performance
• Premium Koyo quality and engineering
• Made in Japan

Performance Benefits:

• Dual Pass Design: Coolant flows through core twice for maximum heat dissipation
• 36mm Core: Thicker core provides increased cooling capacity
• Superior Cooling: Handles turbocharged SR20DET heat output
• All-Aluminum: Lighter than factory radiator while providing better cooling
• Direct Fitment: Bolt-in replacement for factory radiator
• Track Ready: Proven in drift, time attack, and road racing

Specifications:

• Brand: Koyo
• Part Number: HH020252N
• Product: N-FLO Dual Pass Radiator
• Core Thickness: 36mm
• Design: Dual pass
• Material: All-aluminum construction
• Weight: 13.8 lbs
• Made in: Japan

Fitment Information:

• Compatible Vehicles:
• 1989-1994 Nissan 180SX (SR20DET, manual transmission)
• 1989-1994 Nissan Silvia S13 (SR20DET, manual transmission)
• IMPORTANT - Manual Transmission Only:
• This radiator is designed for manual transmission S13 models
• Will NOT fit automatic transmission models (different radiator design)
• Verify your S13 has SR20DET engine and manual transmission before purchasing

What's Included:

• Koyo N-FLO dual pass radiator
• Mounting hardware (if applicable)
• Installation instructions

Installation Notes:

• Professional installation recommended
• Direct bolt-in replacement for factory radiator
• Drain and properly dispose of old coolant
• Use quality coolant for optimal performance
• Bleed cooling system after installation
• Check for leaks before driving

Dual Pass Design - Superior Cooling:

The N-FLO dual pass design routes coolant through the radiator core twice before returning to the engine. This dual pass configuration increases the time coolant spends in the radiator, allowing for more effective heat dissipation. The result is significantly improved cooling capacity compared to single pass radiators, making it ideal for turbocharged SR20DET engines that generate substantial heat.

36mm Core Thickness:

The 36mm core thickness provides increased surface area for heat dissipation compared to thinner factory radiators. The thicker core allows for more coolant capacity and more cooling fins, resulting in superior heat rejection. This increased capacity is essential for maintaining proper engine temperatures during hard driving, track use, or in hot climates.

All-Aluminum Construction:

The all-aluminum construction provides several advantages over factory copper/brass radiators. Aluminum is lighter, more efficient at heat transfer, and more durable. The weight savings reduce front-end weight while the improved heat transfer keeps engine temperatures in check. Aluminum also resists corrosion better than copper/brass, ensuring long service life.

Direct Fit for S13 SR20DET Manual Transmission:

The Koyo radiator is engineered specifically for the S13 chassis with SR20DET engine and manual transmission, providing direct bolt-in fitment using factory mounting points. No modifications are required - the radiator uses factory hose connections, mounting brackets, and fan shroud. This makes installation straightforward for anyone familiar with basic cooling system work.

Track-Proven Performance:

Koyo radiators are proven in professional motorsport including drift, time attack, and road racing. The N-FLO design has been tested under the most demanding conditions and proven to provide reliable cooling even during extended track sessions. This makes it the radiator of choice for serious S13 enthusiasts who demand the best.

Why Koyo?

Koyo has been manufacturing premium cooling components in Japan for decades. Their radiators are known for combining superior cooling performance with reliable construction and direct fitment. Koyo radiators are trusted by professional race teams and enthusiasts worldwide for their proven performance and quality.

Essential for Turbocharged SR20DET:

The turbocharged SR20DET engine generates significantly more heat than naturally aspirated engines, making an upgraded radiator essential for reliability. The factory radiator is often marginal even at stock boost levels, and becomes inadequate with increased boost or aggressive driving. The Koyo N-FLO radiator provides the cooling capacity needed to keep temperatures in check.

Installation Tips:

• Drain factory coolant completely before removal
• Remove factory radiator and inspect hoses for wear
• Install Koyo radiator using factory mounting points
• Connect all hoses and ensure proper fitment
• Fill with quality coolant (50/50 mix recommended)
• Bleed cooling system to remove air pockets
• Check for leaks and verify proper operation

Perfect For:

• S13 180SX/Silvia SR20DET owners seeking improved cooling
• Turbocharged builds with increased boost
• Track day enthusiasts and drift cars
• Anyone experiencing overheating issues
• Builds requiring reliable cooling performance

Perfect For: 1989-1994 Nissan 180SX/Silvia S13 SR20DET manual transmission owners seeking superior cooling with Koyo N-FLO dual pass radiator and 36mm core.

Pro Tip: The dual pass design is essential for turbocharged SR20DET engines - especially important for track use and high-boost builds.

Manual Transmission Only: This radiator is designed for MT models. Will NOT fit automatic transmission S13.

Upgrade your S13 cooling with Koyo N-FLO radiator - dual pass, 36mm core, SR20DET MT, all-aluminum, improved cooling, track proven, made in Japan.