This idler is a stock size replacement for the steel GT500 Thump Tensioner pulley. Our pulleys are hard black anodized to ensure a durable and long lasting finish. They also come preinstalled with premium bearings.
Thump: 478g (1.05lb)
Billet Pro Shop: 220g (0.5 lb)
*Please install with retaining clip facing the front of the car.