Our Billet Double Roller 9 (Nine) Way Adjustable Timing Chain & Gears allows nine different camshaft timing positions (2, 4, 6 & 8 degrees of advance and 2, 4, 6 & 8 degrees of retardation as well as straight up or 0 degrees). This large adjustable range gives you the maximum flexibility when super-tuning your engine. The timing chain is available in two lengths, standard and 0.005" shorter for align honed blocks. The rear of the cam gear is machined to accept a bronze washer. This washer rides between the cam plate and the cam gear for reduced friction and wear. While we recommend combining this timing chain with our 'Nitemare Laser Cut Pro Oiling Cam Plate' for the ultimate timing chain setup for your Pontiac, this trick timing chain will work with stock cam plates.