Mishimoto Performance Aluminum Radiator – 1989-1994 Nissan 240SX (S13) w/ KA24DE

Keep your KA24DE-powered S13 running cool on the street and on track with the Mishimoto Performance Aluminum Radiator. Engineered specifically for the 1989–1994 Nissan 240SX (S13) with KA24DE engine, this direct OEM-fit aluminum radiator improves cooling efficiency by up to 30% over the factory unit — protecting your engine from heat soak during spirited driving, track sessions, and hot weather daily use. Featuring a lightweight dual-core design, 100% brazed aluminum construction, and polished end tanks, the Mishimoto radiator is a straightforward bolt-in upgrade that requires no cutting or modification.

Key Features:

• Up to 30% improved cooling efficiency — significantly more cooling capacity than the factory radiator for street, track, and daily driving applications
• Dual-core aluminum construction — dual-core design increases coolant contact surface area for maximum heat transfer
• 100% brazed aluminum — fully brazed construction for superior strength, leak resistance, and long-term durability versus plastic-tank OEM radiators
• Polished aluminum end tanks — clean, premium appearance with corrosion-resistant polished finish
• Direct OEM fit — bolt-in replacement for the factory radiator; no cutting, drilling, or modification required
• KA24DE specific — engineered for the 1989–1994 Nissan 240SX (S13) with KA24DE engine
• Lightweight construction — aluminum is significantly lighter than the factory copper/brass or plastic-tank radiator

Performance Benefits:

• 30% More Cooling Capacity: Dual-core aluminum construction provides up to 30% more cooling efficiency than the factory radiator — keeping coolant temperatures lower under the sustained heat loads of track driving, aggressive street use, and hot weather
• Heat Soak Protection: Improved cooling capacity prevents the heat soak that causes power loss, detonation risk, and accelerated engine wear on the aging KA24DE cooling system
• Brazed Aluminum Durability: 100% brazed aluminum construction eliminates the plastic end tank cracking and seal failure that is common on aging OEM radiators — a long-term reliability upgrade over the factory unit
• Weight Reduction: Aluminum construction is lighter than the factory radiator, contributing to a modest reduction in front-end weight
• Track Reliability: Increased cooling capacity provides the thermal headroom needed for sustained track use where coolant temperatures can climb significantly above street driving levels

Specifications:

• Brand: Mishimoto
• Part Number: MMRAD-240-89KA
• Material: 100% brazed aluminum
• Core Design: Dual core
• End Tanks: Polished aluminum
• Cooling Improvement: Up to 30% over factory
• Fitment: Direct OEM replacement (no modification required)
• Application: 1989–1994 Nissan 240SX (S13) — KA24DE engine

Fitment Information:

• 1989–1994 Nissan 240SX (S13) — KA24DE engine (hatchback and fastback)
• Note: This radiator is for KA24DE-equipped S13 240SX only — not for SR20DET or other engine swap applications. Verify your engine before ordering.
• SR20DET / Engine Swap Note: If your S13 has been swapped to an SR20DET or other engine, verify radiator fitment requirements for your specific swap configuration before ordering.
• Installation: Direct bolt-in replacement — no cutting or modification required
• Fan Shroud: Pair with the Mishimoto 240SX aluminum fan shroud for maximum cooling efficiency

What’s Included:

• Mishimoto performance aluminum radiator (MMRAD-240-89KA)
• All mounting hardware
• Installation instructions

Installation Notes:

• Drain and flush the cooling system before installation
• Inspect all coolant hoses and clamps and replace if worn or cracked
• Use a quality coolant appropriate for aluminum radiators — avoid coolants with silicate additives that can damage aluminum
• Bleed the cooling system thoroughly after installation to remove air pockets
• Check for leaks after the first heat cycle
• Pair with the Mishimoto aluminum fan shroud for maximum cooling efficiency

Why Upgrade the S13 Radiator?

The factory 1989–1994 Nissan 240SX radiator is now 30–35 years old — and age takes a significant toll on cooling system components. Plastic end tanks crack and leak, internal passages corrode and restrict flow, and the overall cooling capacity of a worn factory radiator is a fraction of what it was when new. Even a factory-condition S13 radiator has limited cooling capacity for performance driving — the KA24DE runs warm under sustained load, and track use or aggressive street driving can push coolant temperatures into concerning territory. The Mishimoto aluminum radiator addresses both problems simultaneously: it replaces aging, failure-prone factory hardware with a durable, all-aluminum unit that provides 30% more cooling capacity than the factory specification.

The S13 240SX Platform:

The 1989–1994 Nissan 240SX (S13) is one of the most beloved and versatile Japanese sports car platforms in the enthusiast community — a lightweight, rear-wheel-drive chassis with a well-balanced suspension layout that has made it a staple of drifting, time attack, and grassroots motorsport for decades. Whether running the factory KA24DE or a popular engine swap, the S13’s cooling system is a critical reliability component that deserves the same attention as the rest of the build. The Mishimoto aluminum radiator is one of the most straightforward and impactful cooling system upgrades available for the platform.

Why Mishimoto?

Mishimoto is one of the most recognized names in performance cooling components, with a comprehensive lineup of aluminum radiators, intercoolers, oil coolers, and cooling accessories for import and domestic performance vehicles. Their 240SX radiator is engineered specifically for the S13 platform — not a universal fit — ensuring correct fitment, proper hose connection placement, and compatibility with the factory cooling system layout.

Perfect For:

• 1989–1994 Nissan 240SX (S13) KA24DE owners replacing a worn, leaking, or inadequate factory radiator
• S13 track day and drift builds requiring improved cooling capacity for sustained high-performance use
• Street builds in hot climates where the factory radiator struggles to maintain safe coolant temperatures
• Engine rebuilds and restoration projects where the cooling system is being refreshed alongside the engine
• Anyone building a reliable, performance-focused S13 who wants a long-term cooling system upgrade

Pro Tip: Pair with the Mishimoto 240SX aluminum fan shroud for maximum cooling efficiency — a properly sealed fan shroud ensures the radiator fan draws air through the entire core rather than just the area directly in front of the fan blade, significantly improving low-speed and stationary cooling performance.

Note: KA24DE fitment only. If your S13 has been swapped to an SR20DET or other engine, verify radiator fitment requirements for your specific swap before ordering.