SLP Performance Air Box Lid 98 99 V8 Camaro Firebird 4704323 10 S Features:Pre installed Bronze Gear for aftermarket Size:6X Small (24) Features:Pre installed Bronze Gear for aftermarket billet roller camshaftsGear machined from AMPCO 45 aluminum bronze containing 5% NickelCNC machined billet 6061 T6 aluminum housingMaintenance free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm rangeEasy to adjust mechanical advance with supplied springs and stop bushingsNylon 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 bearingMechanical advance assembly can be locked out for crank trigger systemsSupplied with Cap A Dapt and rotor (accepts MSD socket style caps)Must be used with an MSD Ignition Control Cadillac Oldsmobile V8 SLP's initial claim to fame says it all: It was the first company in the performance aftermarket to develop and manufacture a 50 state emission legal performance package specifically for V8 Camaros and Firebirds but to do so with the best engineering practices and quality possible