Koyo Aluminum Radiator for 94-01 Integra

Koyo Aluminum Radiator - 1994-2001 Acura Integra (Manual Transmission)

Your Integra's radiator's been in there for 20+ years. The plastic end tanks are cracked or they're about to crack. The core's clogged with rust and scale. You're watching the temp gauge climb when you're sitting in traffic or when you're on it hard. It's going to fail. Koyo's all-aluminum radiator replaces the entire stock plastic-tank setup with a hand-TIG-welded aluminum unit. No plastic end tanks to crack. No crimped seams to leak. Just a 36mm thick V Series crossflow core with Nocolok brazing and mirror-polished end tanks. The radiator's designed to OE specifications so it bolts right into your Integra using the stock fan shroud. Works with both Showa and Denso type fan shrouds. Your stock hoses connect. Your fan temp switch bolts in. You're pulling the old radiator and bolting this one in. Koyo's Japan's largest aftermarket radiator manufacturer and they're hand-assembling these in their own factories with triple pressure testing. This isn't some cheap eBay radiator. This is a Koyo.

Here's Why Your Stock Integra Radiator's Failing

Every DC Integra left the factory with the same radiator design. Aluminum core with plastic end tanks crimped to the sides. The plastic's fine when it's new. Twenty-plus years later? It's garbage. The plastic gets heat-cycled thousands of times. It gets brittle. The tanks crack around the filler neck or the inlet/outlet connections. The crimped seams start weeping coolant. We've seen Integra radiators with hairline cracks in the plastic that are seeping coolant slowly. The owner doesn't notice until the coolant level's a quart low and the temp gauge is climbing. One day the crack opens all the way and you're stuck with coolant pouring out. The core's also probably half-clogged because nobody's flushed their coolant in 10 years. Rust, scale, and sediment are blocking half the tubes. Your radiator's trying to cool but it can't flow coolant through tubes that are packed with corrosion. Koyo's radiator is all aluminum. Hand-TIG-welded end tanks. No plastic to crack. Nocolok-brazed core with precise tube and fin alignment so every tube's flowing and every fin's transferring heat. You're getting actual cooling instead of fighting a 25-year-old radiator that's trying its best but can't keep up.

V Series 36mm Crossflow Core with Nocolok Brazing

Koyo uses their V Series crossflow core on this radiator. Crossflow means the inlet and outlet are on opposite sides instead of both at the top. Coolant flows horizontally across the radiator instead of vertically down. That gives you better heat transfer because the coolant's spreading across the entire core width. The core's 36mm thick which is thicker than most aftermarket cores. More thickness means more tubes, more coolant volume, and more fin surface area. You're moving more heat. The core's Nocolok-brazed. That's vacuum brazing where the aluminum's heated in a controlled atmosphere and the joints are fused without solder. It's stronger and more uniform than traditional soldering. The tubes aren't going to separate. The fins aren't going to fall off. Koyo hand-assembles every core and then hand-TIG-welds the aluminum end tanks. Each radiator's triple pressure-tested before it ships. They're not sending out radiators that leak. The finish is mirror-polished. It doesn't look like a cheap radiator. It looks like something you'd see on a clean build.

You Need a Rad Cap - Stock Cap Won't Fit

The stock Integra radiator cap doesn't fit this radiator. The filler neck's a different design. You need a Koyo SK-C13, SpeedFactory Type A, or Hybrid Racing Type F radiator cap. That's sold separately. Don't try to use your stock cap. It won't seal. You'll have pressure loss and coolant burping out the overflow. The SK-C13 is a 1.3 bar (18.85 PSI) high-pressure cap. That's higher than the stock 1.1 bar cap. Higher pressure raises the boiling point of your coolant from around 250°F to around 257°F. That extra headroom matters when you're running hard or sitting in traffic on a 95°F day. Buy the cap when you buy the radiator. Don't find out the hard way that your stock cap doesn't fit when you're trying to button everything up and the cap's not sealing.

Fits Both Showa and Denso Fan Shrouds

This radiator works with both types of OEM Integra fan shrouds. Honda used two different fan shroud designs on the Integra. Showa type and Denso type. You've got one or the other. Koyo's radiator fits both. Your stock fan shroud bolts right up. Your stock upper and lower radiator hoses connect. Your fan temp switch bolts into the radiator in the stock location. The inlet and outlet locations are optimized for the Integra's hose routing. Installation's straightforward if you've done cooling system work before. Drain the old coolant, unbolt the old radiator, bolt in the Koyo, connect your hoses and fan shroud, fill it with fresh coolant, burp the air out, and you're done. Two hours tops. The radiator comes with a billet aluminum filler neck and a billet aluminum drain plug. Koyo builds these to OE specifications which means they're designed as direct replacements for the stock radiator. Everything bolts up like it's supposed to.

What You Get

• Koyo all-aluminum radiator for 1994-2001 Integra (manual transmission only)
• 36mm thick V Series crossflow core (thicker than most aftermarket cores)
• Hand-TIG-welded aluminum end tanks (no plastic to crack)
• Nocolok-brazed core (vacuum brazed, no solder joints)
• Precise tube and fin alignment (every tube flows, every fin transfers heat)
• Billet aluminum filler neck (requires Koyo SK-C13 cap or equivalent)
• Billet aluminum drain plug
• Mirror-polished finish
• Triple pressure-tested at Koyo factory in Japan
• Direct bolt-in (works with both Showa and Denso fan shrouds)
• Optimized inlet, outlet, and fan temp switch locations
• Made by Koyo in Japan

Fits These Cars

• 1994-2001 Acura Integra GS/LS/RS
• 1994-2001 Acura Integra GS-R
• 1997-2001 Acura Integra Type R
• 1996 Acura Integra Special Edition

Note: Manual transmission only - automatic cars use different radiator. Stock radiator cap does NOT fit - must use Koyo SK-C13 or equivalent (sold separately, 1.3 bar high-pressure). All-aluminum construction eliminates plastic end tank failures (stock has plastic tanks that crack after 20+ years). Hand-TIG-welded aluminum end tanks and Nocolok-brazed core (no crimped seams, no solder joints). 36mm thick V Series crossflow core (inlet and outlet on opposite sides, coolant flows horizontally for better heat transfer). Works with both Showa and Denso type OEM fan shrouds. Direct bolt-in using stock fan shroud, stock upper and lower hoses, stock fan temp switch location. Optimized inlet and outlet locations for Integra hose routing. Billet aluminum filler neck and drain plug. Mirror-polished finish. Triple pressure-tested at Koyo factory in Japan. Designed to OE specifications (direct replacement for stock radiator). Fits all 1994-2001 Integra trims (GS, LS, RS, Special Edition, GS-R, Type R) with manual transmission. Installation takes 2 hours (drain coolant, unbolt old radiator, bolt in Koyo, connect hoses and fan shroud, refill coolant, burp air). Made by Koyo - Japan's largest aftermarket radiator manufacturer.