LS3, TENSIONER, TIMING CHAIN, 12626407 A5 The thermostat features female -10AN

The thermostat features female -10AN O-ring boss threads and is available with AN fittings in -06AN

They accurately measure camshaft centreline

with your choice of valve springs and timing gear/chain options to suit your application

GM Head bolts and GM Lifter Buckets*

When subjected to higher lift cams and increased spring rates the stock needle bearing cages have shown their weakness and failed in performance applications

LS3, TENSIONER, TIMING CHAIN, 12626407 A5 The thermostat features female -10ANACDelco timing chain tensioners apply the pressure that helps keep your vehicle running at optimum performance and your timing chain operating efficiently. These replacement components will make sure your chain retains consistent working order to keep your engine marching "in time." The precision machined and assembled parts offer an exact fit with a design for increased durability. Find the model designed for your make model application, then keep