Perrin Blue Lightweight Water Pump Pulley 2015-2023 Subaru WRX Brakes- Rotors & Pads>Brake Rotors - Drilled

Perrin Blue Lightweight Water Pump Pulley 2015-2023 Subaru WRX Brakes- Rotors & Pads>Brake Rotors - DrilledPerrin's Lightweight Water Pump Pulley is designed to reduce the weight of rotating engine parts, resulting in improved throttle response, increased horsepower and torque. This easy to install part is constructed from high quality materials and weighs . 48lbs, a reduction of . 28lbs when compared to the OEM pulley. Fits 20152022 Subaru WRX.

Installing the AOS prevents oil from entering the intake

but can be modified to work with the OEM pickup

high tolerance factory fitment

They start off with large 1 7/8 primary runners that come together in a true low angle 4-1 merge collector that then flow into a huge 2

Unlike AOS systems

Front Cooler: Additional 12 Rows

Further improving filtration is internal baffling within the AOS itself

Rear Spring Rates: 280 lb

1144 StressProof Studs

The two 100% silicone hoses are crafted with four-layers of silicone and heat-resistant embedded fibers for added strength

Set of four

This design cools more efficiently by allowing the coolant to remain in the radiator for a longer period of time therefore transferring more heat to the surrounding air