Koyorad RH020539N 53 mm Hyper V Dual-Pass Radiator for 89-98 Nissan 240SX

Vehicle Fitment

• 1989-1994 Nissan 240SX (S13) - V8 swap or KA24E/DE, Manual Transmission
• 1995-1998 Nissan 240SX (S14) - V8 swap or KA24DE, Manual Transmission (minor modification needed)

Features

• 53 mm thick dual-row Hyper core for superior heat transfer
• Dual-pass N-FLO cross-flow design for maximum cooling efficiency
• Billet filler neck and drain plug included
• Precise fan shroud mounting to retain OEM or aftermarket fans
• Built with TIG-welded, furnace-brazed all-aluminum construction
• Lightweight core reduces front-end weight and improves airflow
• Triple pressure tested to ensure performance and leak resistance
• Compatible with conventional "Green" coolant (not Dexcool)

Specifications

• Core Thickness: 53 mm
• Material: All-aluminum Hyper core with furnace brazing
• Design: Dual-pass, cross-flow with N-FLO partition
• Inlet/Outlet: 35 mm aluminum tubes
• Fan Shroud Compatibility: OEM 240SX S13/S14 with slight mounting adjustment for S14
• Finish: Natural aluminum
• Pressure Tested: Yes, triple-checked

Included Components

• 1x Koyorad RH020539N Hyper V-Series Dual-Pass Radiator
• 1x Billet filler neck
• 1x Billet drain plug

Product Description

The Koyorad RH020539N is a high-performance all-aluminum radiator engineered for 1989-1994 Nissan 240SX (S13) and 1995-1998 S14 chassis running V8 swaps or KA24E/DE turbo configurations with a manual transmission. Featuring a 53 mm thick Hyper core and dual-pass N-FLO cross-flow design, it delivers exceptional cooling capacity - ideal for mods that generate increased heat. Its direct-fit design supports OEM fan shrouds with minor adjustments needed for S14 models :contentReference[oaicite:3]{index=3}.

Constructed with precision TIG welding and furnace brazing, this radiator is both durable and lightweight, helping to improve engine bay airflow and handling. It includes a billet filler neck and drain plug, is triple pressure tested for reliability, and only requires conventional "green" coolant for safe operation.

Perfect for daily-driven or track-focused 240SX builds with manual transmissions, the RH020539N delivers race-proven cooling without compromising on quality or fitment - making it the go-to upgrade for enthusiasts and tuners.