Description:

LISTING INCLUDED Set of 16 "Metal Clad" Viton Valve Seals(These are some of the best seals on the market!!).. DIAMETER SIZE 0.313" stem X0.500";. COMPATIBILITY Fit the GM Small Block LS1 / LS6 engines and 4.8L, 5.3L, 5.7L, 6.0L, 6.2L & 7.0L truck, SUV and Corvette engines as well.. NOTE GM uses 2 different valve seal styles on the LS motors: "Small" and "Top Hat". "Top hat" style valve seals can only be used with single valve springs (different listing). If you are going to keep or change your valve springs to single springs, you should/can use the "top hat" design;.