New Fel Pro intake and exhaust valve seals for LS1-LS7 engines. Set of 16 (8 exhaust valve seals, 8 intake valve seals). These are the design with the retainer that sits under the valve spring, aka "top hat" design. Fits all LS engines with single valve springs.

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. If you are upgrading your valve springs to dual springs, and already have the "top hat" design, you will need to use small valve seals instead.