Drop in Chevy LS1 / LS6 2.00 8mm 21-4N Stainless-Steel Fully machined Swirl polished, Under cut Intake Valves & Stainless-steel 8mm 21-4N swirl polished 1.57 Exhaust valves. Drop in for 035, 317, 799, 243 and other castings with 2.00/1.57 valve sizes.
