Kibblewhite Performance Titanium Valve Spring Kit With Intake & Exhaust Valves. The Best On The Market! Fits Honda CRF250R Years 2004 2005 2006 2007.Kibblewhite One Piece Stainless Steel Black Diamond Valves & Race Spring Kit! Inner & Outer Intake & Exhaust Springs. Stainless Steel Stock Size Intake Valves (Pair 2). Stainless Steel Stock Size Exhaust Valves (Pair 2). Kibblewhite Red Viton Valve Stem Seals (All 4). This is your ultimate race rebuild kit! This is the full conversion kit for your head for more reliability, more power and give you the ability to run the biggest race cams you want!