PEM Standard Quick Change Gears Set #15Q RP110220 Tethers are available in one Size:X Large Tethers are available in one inch increments Features:CNC machined billet aluminum housing and billet aluminum baseWill not accept a vacuum advance canisterMust be used with an MSD Ignition ControlO ring seals can be added to modified blocks to improve oil pressure controlΓÇÜ├ä┬ó┬ ¼Î“Çá┬ ¼Î“ÇáSupplied with socket style distributor cap and rotorSpecial oil tract improves lubrication to the distributor and cam gearNylon pads ensure smooth operation of the advance weightsAdvance weight pins are staked and tig welded to the plateMechanical advance assembly can be locked outAdvance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reductionPolished steel shaft is QPQ coated and guided by a sealed ball bearing and extra long sintered bushingMaintenance free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range┬ ¼Î“ÇáEasy to adjust mechanical advance with supplied springs and stop bushingsNo CARB Exemption Order Number Quick Change Gear Set 11 Ratio 4