This radiator cap is a must - have for an upgraded cooling system. It's a genuine Subaru OEM part. Designed to fit 2004 - 2021 Subaru STI and 2002 - 2024 Subaru WRX models. Radium caps are engineered to boost cooling efficiency safely. By managing the boiling temperature, a higher radiator pressure effectively raises the coolant boiling point. This gives an extra safety margin and stops air pocket cavitation at the water pump. The cap has a 15.7lb pressure rating.
Using this radiator cap is easy. Just replace your old radiator cap with this new one. Make sure the engine is cool before you start. When you're installing it, ensure it's tightly sealed to prevent any coolant leaks. As for maintenance, check the cap regularly for any signs of wear or damage. If you notice cracks or if the pressure - sealing ability seems off, it's time to replace it. Keep it clean to maintain its performance. This radiator cap is built to last, but proper care will ensure it serves you well for a long time.
