Nitrous Express 20110-12 One Piece MAF System with 12 lbs. Composite Bottle for GM LS-1 and LS-2 Engines Compact, easy to install MAF housing Machined from billet 6061 aluminum with integrated lifetime warranty solenoids Complete with a 12 pounds composite bottle, bottle brackets, stainless braided nitrous and fuel feed lines, plug and play wiring harness, TPAS module and all necessary hardware for a complete installation. Fits all GM one piece mass air flow applications. 35-200 wheel horsepower.