Snow Performance 4150 Flange Gas Stage 1 N/A Water Inj Kit (SS Line 4AN Fittings w/o Tank)

The 4150-style carburetor spacer plate, threaded for 1/8" injection nozzles, is the core of this water-methanol injection system. This setup is designed to increase your pump gas octane by 20-25 points, allowing you to run higher compression ratios, like 11:1 to 13:1, and unlock more power from your naturally aspirated V8 muscle car. By injecting a water-methanol mixture, you achieve cooler intake charges, which directly combats detonation and increases efficiency.

This Stage 1 system is specifically tuned for naturally aspirated engines and activates only under wide-open throttle (WOT) using a dedicated switch. This ensures you're getting the octane boost and detonation suppression precisely when your engine needs it most, under full load. The system also includes a solenoid valve to prevent vacuum siphoning, a common concern with these types of setups, and comes with two nozzles capable of covering a wide range of horsepower figures. All necessary hardware and comprehensive instructions are included for installation.

This kit allows you to safely use lower grades of gasoline while still achieving significant performance gains. The stainless steel braided lines with 4AN fittings offer durability and a clean installation. Keep in mind that this system is not CARB approved and cannot be shipped to California. It's a solid option for enthusiasts looking to extract more performance from their modified V8 without resorting to race fuel.