The new generation Track 1 now features a 221cc intake port. The intake port flows almost 20cfm better than the old version. Complete Track 1s come with 2.08/1.60 (2.055/1.600 on hyd/solid) stainless steel valves, dual springs, steel retainers, 10° valve locks, guide plates and rocker studs. Bowls are blended, intakes port matched. Prices per pair.