Kitaco all new SE Pro cylinder head for Honda XR100R CRF100F Ape 100 NSF 100 is the next generation after the Ultra SE. Improved intake porting providing even more flow, larger valve guides, and larger valve faces with 4mm stem for ultra light reciprocating mass. Accepts SPL, Ultra SE and new SE-R camshafts. This cylinder head kit is sold with valve train installed, no covers or gaskets.