• Twin Power is proud to introduce a new line of high-quality USA-made valve and spring kits to the product line.
• These are offered as Replacement Complete Engine Kits.
• Engine kits include (four) valves, a complete O.E.M. replacement-style spring kit, steel retainers and keepers, and valve guide seals, where applicable.
• From Knuckleheads to the latest Twin Cam models, we give you everything you need in one kit.
• Only one part number to order for a complete cylinder head overhaul.
• Easy-to-order, easy-to-stock, and made in USA.
• Black Diamond Valves: Black Diamond™ Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface build-up of .0002. This Black Diamond process improves wear properties, reduces friction and provides resistance to corrosion. Valves are lightweight, strong, one-piece forgings with profiles that provide excellent flow characteristics.
• Spring Kits: O.E.M. type replacement kits are designed to give stock pressures and work with stock cam profiles. These kits are manufactured to original O.E.M. specifications using premium modern materials, design protocols and manufacturing techniques. All components are the high-quality parts you expect from Twin Power. Valve springs are wound from super-clean chrome, silicon valve spring wire that has been heat-treated and shot-peened. The retainers, keepers and bases are designed to provide maximum mechanical strength. Beehive-style springs are supplied where applicable for stock replacement.
• Valve Guide Seals: Red 100%  high temperatures, petroleum products and the corrosive gasses.
• Made in USA
• Dealer must install and fit valve guides as needed

Note: Late Shovel kits include a stock type K Line seal. Knucklehead and Ironhead Sportsters® do not include seals

(2) Stainless steel intake valves

(2) Stainless steel exhaust valves

(8) H.T. steel keepers (4 pairs)

(4) H.T steel lower collars

(8) Silicon springs (4 pairs)

(4) Steel retainers

Instructions