STILLEN 400385 Underdrive Performance Lightweight Crank Pulley - 05-14 Nissan Frontier / Pathfinder / Xterra 4.0L / 09-12 Suzuki Equator 4.0L Underdrive Crank Pulley; Billet Aluminum CNC Machined at STILLEN OEM Pulley Weight: 8.19 lbs.; STILLEN Pulley Weight: 1.00 lbs. Approximate Underdrive: 20%; Shorter Belt Required and Sold Separately (Not For Use with STILLEN Supercharger)