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Return to Parts List Category : A- Small Block "LA" : Valve Springs : Installed Kits PAC 1120VSK 1120 SPRNG KT INSTALLED 11/32" VLV PAC 1218 SPRINGS, SEALS, LOCKS AND RETAINERS INSTALLED ON PR OF HEADS $464.50 Springs, Seals, Locks And Retainers Installed On Pair Of Heads This kit uses 11/32" locks and includes valve spring locator cups for use on aluminum heads.  More RPM with less spring pressure due to the weight reduction at the valve. The same results as installing 16 titanium valves at the cost of 1 titanium valve. Here at Hughes Engines we radius and chamfer the tip of the final coil smoothy to obtain proper retainer clearance. This is a critical area overlooked by many engine builders. Here at Hughes, it's standard.