If you're putting together an electric fan setup for a 240SX or an SR20DET swap and you want a compact, high-flow fan that mounts almost anywhere, the ISR Performance 12 Inch Radiator Fan is built for exactly that kind of build. It's a universal-fit electric fan that moves 1,150 cfm of air, runs as either a pusher or a puller, and pairs up cleanly when you need more than one. ISR recommends running two of these on a 240SX or SR radiator for proper cooling.
What It Is
The ISR Performance 12 Inch Radiator Fan is a universal-fit electric radiator fan with a 12 inch diameter and a compact design. It's a high-flow fan rated at 1,150 cfm of airflow, and it can be configured as either a pusher or a puller depending on how you mount it. It works well with SR20DET swaps and any 240SX that needs an electric fan kit, and it suits plenty of other universal applications too.
What It Does
An electric radiator fan pulls or pushes air through the radiator to keep coolant temperatures in check, which matters most at idle and low speed when there isn't enough airflow coming through the front of the car on its own. This fan moves 1,150 cfm, and the compact 12 inch size lets it fit in tight engine bays or pair up side by side on a wider radiator. On a 240SX or SR radiator, ISR recommends running two fans to get enough airflow across the full core.
Reversible for Pusher or Puller Use
This fan is easily reversible, so it works as either a pusher or a puller. A puller fan mounts behind the radiator and pulls air through the core, which is generally the more efficient setup. A pusher fan mounts in front of the radiator and pushes air through, which is the way to go when there isn't room behind the radiator for a fan. Being able to run it either way is what makes a universal fan like this fit so many builds. Just confirm the airflow direction matches your mounting position before you button everything up.
Fitment and Compatibility
This is a universal-fit fan, so it works across a wide range of applications. It's a particularly good match for:
- Nissan 240SX builds needing an electric fan kit
- SR20DET swaps
For a 240SX or SR radiator, ISR recommends running two 12 inch fans to cover the core properly. Confirm you have the clearance and the radiator surface area for your chosen pusher or puller setup before mounting.
Who This Is For
This fan fits a few common build profiles. If you're running an SR20DET swap or building out a 240SX cooling setup and you need a reliable electric fan, this is a proven fit. If you want a compact fan that can mount as a pusher or a puller depending on your space, the reversible design gives you that flexibility. If you're building a wider radiator setup, two of these pair up to cover the core.
This is not the right fan if you need a single fan to fully cool a large 240SX or SR radiator on its own, since ISR recommends a pair for those applications. Make sure you account for that when planning your build and your wiring.
Recommended Supporting Parts
For a clean, secure install, add the ISR Radiator Fan Mounting Kit, which makes mounting the fan to your radiator straightforward rather than improvising brackets or zip ties.
Installation Notes
This is a universal fan, so installation depends on your specific radiator and mounting position. Decide whether you're running it as a pusher or a puller, confirm the airflow direction is correct for that position, and mount it securely, ideally with the ISR Radiator Fan Mounting Kit. Wire the fan through a proper relay and a switch or temperature sensor rather than running it off a light-duty circuit, and verify the fan spins the right way to move air in your intended direction before final assembly.
Product Details
Brand: ISR Performance
Product: 12 Inch Radiator Fan
Part Number: IS-12Fanx
Fitment: Universal
Diameter: 12 inch
Airflow: 1,150 cfm
Configuration: Reversible, pusher or puller
Popular Applications: Nissan 240SX, SR20DET swaps
Recommended: Two fans per 240SX/SR radiator
Recommended Supporting Part: ISR Radiator Fan Mounting Kit
Key Benefits: High-flow 1,150 cfm output, compact 12 inch design for tight fitment, reversible pusher or puller configuration, universal fitment, great match for 240SX and SR20DET builds