VALVE COTTER SINGLE GROOVE COMPETITION (1 UNIT=2 HALVES)

New competition valve cotter, these are precision CNC machined from 4340 and heat treated to a better spec than EN24T and claimed to be stronger in fatigue life. These locate better in the valves and easier to control spring heights. Made to RACE specification for performance heads or valves by going one better in quality and fitment, do not take a risk--buy the best available on this part. All the early heads used the 2A11 cotters, noted by the wide slot in the valve. Current production race quality valves and most aftermarket valves, use the 88G549 keeper with a single narrow groove. Valve stems with 3 grooves on some A-Plus heads, use CAM6975 collets. Order the correct cotters to go with the valves you will be using. Two halves equal one cotter for one valve, order 8 for 1 complete cylinder head.