ISR Performance Aluminum Radiator - Nissan S14 240sx 95-98 KA24

The ISR Performance Aluminum Radiator is a direct-fit cooling upgrade for the 1995-1998 Nissan 240SX (S14) with the factory KA24 engine. TIG welded aluminum construction, comparable cooling efficiency to the more expensive Koyo units, and dimensionally a direct drop-in replacement for the factory radiator.

What It Does

The factory 240SX radiator is aging out on most surviving S14 cars at this point. Pinhole leaks, corroded fins, and reduced cooling capacity are all common failure modes that show up as overheating on hot days or under sustained track use. The ISR aluminum radiator replaces the factory unit with a TIG-welded all-aluminum construction that handles higher heat loads, weighs less, and bolts in as a direct drop-in.

For builds running upgraded turbos, the higher cooling capacity helps margin against the increased heat output. For daily drivers, it's a preventative replacement before the factory radiator strands you on the side of the road.

Comparable to Higher-Priced Alternatives

Comparable in size and cooling efficiency to the more expensive Koyo units. ISR positions this as the value alternative in the all-aluminum 240SX radiator market - same construction philosophy, more accessible price point.

Recommended Install Timing

Install this when swapping in a motor, or soon after any engine refresh. Replacing the radiator preemptively is significantly easier than doing it after the new engine has been installed and plumbed.

Fitment

• 1995-1998 Nissan 240SX (S14) with factory KA24 engine

This is the S14 KA24-specific variant. For S13 KA24, S13 SR20DET, or S14 SR20DET applications, ISR offers chassis-and-engine-specific radiators with their own SKUs.

Construction

• Lightweight all-aluminum construction
• TIG welded
• Direct drop-in dimensional fit
• Compatible with factory hose routing

What's in the Box

• 1x ISR Performance aluminum radiator (S14 KA24)

Product Details

Brand: ISR Performance

Part Number: IS-240KA-RADS14

Type: Aluminum Radiator (Direct Drop-In)

Vehicle Fitment: 1995-1998 Nissan 240SX (S14)

Engine: Factory KA24 (KA24DE)

Material: All aluminum

Construction: TIG welded

Comparable To: Koyo aluminum radiators (similar size and cooling efficiency)

Installation: Direct drop-in, factory hose routing

Application: Daily driver replacement, increased-power builds, track use

Sold: Individually

Legality: Off-road and competition use only