Isky Cams Tool Room Dual Spring / Damper Valve Spring - 470 lb/in Spring Rate - 1.170 in Coil Bind - 1.560 in OD - Set of 16 Exhaust Pipe Reducer Features:Designed for street/performance use with

Features:Designed for street/performance use with a mechanical and vacuum advanceWill not fit 235 and 261 enginesMust be used with an MSD Ignition ControlSupplied with a socket style distributor cap and rotorO-ring seals can be added to modified blocks to improve oil pressure controlSpecial 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 out for crank trigger systemsAdvance 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 rangeCNC machined billet aluminum housing and billet aluminum baseVacuum advance canister for improved economy (can be locked out)Easy-to-adjust mechanical advance with supplied springs and stop bushingsCARB E

3/8 in NPT Gauge Port

5 in Length x 3

Cable Bracket Constructed from 12-gauge Cold Rolled Steel

Twist Lock Design

Isky Cams Tool Room Dual Spring / Damper Valve Spring - 470 lb/in Spring Rate - 1.170 in Coil Bind - 1.560 in OD - Set of 16 Exhaust Pipe Reducer Features:Designed for street/performance use withTest proven for 1000 racing miles, Precision Tool Valve Springs feature the highest quality alloy wire and trade secret endurance processing. Great for Super Modifieds, ARCA, Grand National, NASCAR Trucks, Cup and applications up to 8800 RPM. As the world's largest racing, performance, and economy cam manufacturer, Isky maintains a dynamometer testing program for constant improvement of camshaft and valve train design. These tests are conducted daily