Scion FR-S Lightweight Alternator Pulley - Go Fast Bits - Underdrive - 2013+. A high-quality billet pulley engineered to reduce rotating mass for a crisper, more responsive drive.

Machined from a single block of 6061-T6 aluminum with tight CNC tolerances, this GFB alternator pulley sheds significant weight versus stock. By cutting rotational inertia by up to 85%, more of your engine's torque goes to the wheels, improving throttle response and acceleration. The underdrive profile reduces accessory drag at higher RPM, and GFB thoroughly tests to ensure charging and accessory performance remain within spec. It's a true bolt-on with no tuning or supporting mods required.

Features

• 6061-T6 billet aluminum, precision CNC machined
• Up to 85% inertia reduction vs. OEM pulley
• Underdrive design to lessen parasitic load
• Direct bolt-on; no tune or extra mods needed
• Tested to maintain accessory function

Ready to build a more responsive FR-S? Call us with questions or to schedule installation. We serve Austin, Texas and the Los Angeles, California area with in-house installation and customization services at both locations: 512-982-9393 (TX) or 562-981-6800 (CA). Considering multiple items? Contact us for potential shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov