Big Gun 40-R12A - 05-07 Suzuki RM-Z 450 Rev Box coupon_5 Easy bolt-on installation

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Big Gun 40-R12A - 05-07 Suzuki RM-Z 450 Rev Box coupon_5 Easy bolt-on installationBig Gun 40 R12A 05 07 Suzuki RM Z 450 Rev Box If you are looking to swap out the stock CDI box, the Big Gun Over Rev Box is an affordable alternative to highly priced OEM replacement boxes. It increases the overall RPM limit over the stock box and advances the timing curve.