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Crower's Toyota Supra 2JZ valve springs and titanium retainers are available for the high lift, high rpm applications. The new single valve spring delivers 15% more pressure across the board than the factory part. Also, with a coil bind of 0.820", the Crower spring allows for more cam lift than factory springs will allow. Crower titanium retainers weigh in at 7 grams vs. stock steel at 14.5 grams. Pickup additional rpm's by reducing valve train weight.
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