PERRIN Lightweight Alternator Pulley Blue - Fits 06-14 Subaru WRX / 07-21 STI / 06-13 Forester subaru-outback-xt-2005 If you are planning on

If you are planning on making 500whp or less

Superior engineering enables the Carbon-D clutch system to posses an ideal clutch engagement position

Ideal replacement for the failure-prone stock radiator

Compatible with COBB SF Intake

use this pump in conjunction with the IAG Spec FA24 Hi-Flow Direct Fuel Injector Set by Nostrum

PERRIN Lightweight Alternator Pulley Blue - Fits 06-14 Subaru WRX / 07-21 STI / 06-13 Forester subaru-outback-xt-2005 If you are planning onThe PERRIN Lightweight Alternator Pulley in blue is designed for 2006 2014 Subaru WRX, 2007 2021 STI, and 2006 2013 Forester models. This precision engineered pulley reduces rotational mass, improving engine responsiveness and efficiency. By decreasing parasitic drag on the engine, it helps enhance throttle response and can contribute to smoother power delivery. Built for durability and performance, its an ideal upgrade for enthusiasts aiming to