Do you need TI retainers with the 224 cam?
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Just wondering, how come they are pricey, more than the springs themselves! 918s you can get for 160 and the retainers for them are like 170-180. Just wondering if you need them and what exactly do they do?
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They are a lot lighter which helps to enhance valvetrain stability at higher rpms. They aren't necessary but a good idea. A lightweight valvetrain is good when you're spinning the motor high. How high do you plan on revving? If over 64-6500 def. get the titanium retainers.