Set of 8 Titanium Retainers (4 x Intake + 4 x Exhaust) made of best grade titanium (grade 5)
These are a direct replacement for the original steel retainers on the:
Ninja 250R (2008-2011)
Ninja 300 (2012-2017)
Ninja 400 (2018+)
Z300
Z400
Also fits KX250F (2004-2006) - only uses 4 retainers
 
The original steel retainers weight 6.0g and the titanium retainers weight XXg
 
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.
 
We also have Stainless Steel Valves and Upgraded Valve Springs for the Ninja 300 / 400 engine