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APPLICATIONS BY PART NUMBER

Single Kits are for one 4-bbl carburetor with:
665-MP-9520 1-stage nitrous
665-MP-9550 1-stage nitrous above 700 HP
665-MP-9540 2-stage nitrous
665-MP-9525 2-stage nitrous under 700 HP
665-MP-9555 2-stage nitrous above 700 HP

Dual Kits are for two 4-bbl carburetors with:
665-MP-9530 1-stage nitrous
665-MP-9535 2-stage nitrous

A 3-Stage Nitrous Kit is also available.