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Can you fit adjustable cam gear on a rb25det? The reason i ask is my tuner has not done it before. He said it has a adjustable one on i think he said the intake. Can you replace that with a greddy or hks one as well as the exhaust? I brought a set for my old rb20 and never put them on so was going to with this motor. Also what gains are seem by them. Thanks

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Only on exhaust, some gains if you have the right mods [debateable] to back it up, 10-20rwkw maybe. There is variable valve timing on the inlet side, this stops you installing a cam gear without major mods to ditch it.

sell the cam gears you have, if the car already has one, you don't need them.

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