QA1 Pro Coil Twintube Double Adjustable Coil Over Shock Kit 450 lb in Spring Rate Front Various GM Applications (Pair) 20 PRY NB 3XS Features:CNC machined billet aluminum housing Size:Junior Features:CNC machined billet aluminum housing and billet aluminum baseWill not accept a vacuum advance or MSD Cap A DaptSupplied with an HEI style distributor cap and rotorMust be used with an MSD Ignition ControlMechanical advance assembly can be locked out for crank trigger systemsNylon pads ensure smooth operation of the advance weightsAdvance weight pins are staked and tig welded to the plateAdvance 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 bearingMaintenance free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm rangeEasy to adjust mechanical advance with supplied springs and stop bushingsNo CARB Exemption Order Number 2L2016+ Chevrolet Camaro 6 Non Adjustable Pro Coil System Features: Steel to experienced technicians available to help increase your 60’ times or handle curves with confidence