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Nos Kit

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While most nitrous systems are designed to work only at wide-open throttle, there are progressive controllers available, like this NOS unit, that add nitrous gradually in proportion to throttle position. This accessory would be a welcome addition for 4x4 owners looking for an occasional power boost during part-throttle conditions. Unfortunately, these progressive controllers typically aren't available with 50-state emissions-legal nitrous kits.

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