Stainless Posi-Flow stainless intake valves 2.072″ diameter with 11/32″ stem. 5/16″ undercut and are .100″ longer on the stem so you can achieve enough installed height when using a mechanical roller camshaft with over .650″ lift (overall length 4.850″). When using shallow spring seat heads a 1.900″ installed spring height is impossible without these valves. 6% flow increase over our 5275 valves. Set of 8.
Stainless Posi-Flow intake valves 2.100″ x 11/32″ stem 5/16 undercut with a 45° face. .100″ longer than stock for all out competition use so you can obtain the proper installed spring height when using a roller camshaft (overall length 4.850″). 350-455 V8’s. 6% flow increase (being undercut). Set of 8.