Set of 16 Titanium Retainers (8 x Intake + 8 x Exhaust) made of best grade titanium (grade 5)
These are a direct replacement for the original steel retainers on the:
Kawasaki ZX-10 R (2004-2007)
Kawasaki ZX-10 R (2008-2010)
 
Kawasaki retainers from 2004 to 2007 are notoriously weak and they can break with bad consequences. ABUSO titanium retainers fix this issues.
 
These retainers have a smaller profile/height (1,0 mm shorter) to allow for more valve lift without contact with the oil seal and without requiring valve guide modifications.
 
Using lightweight titanium retainers allows for more aggressive camshaft profiles (lift and duration) without losing control of the valve and increased rpm limits - a must for any performance / race engine.