Upgrade your boosted setup with these 4" billet aluminum water/methanol Boost Cooler Rings. Designed for easy integration, these rings mount directly in-line with your cold side intake piping using standard 4" silicone couplers—no welding required. Each ring features four 1/8" NPT ports, spaced every 90 degrees, allowing flexible placement of your water/methanol injection nozzles. Crafted from high-quality billet aluminum for strength and durability, these rings provide a secure and attractive solution for cooling your charged air. Ideal for enthusiasts looking to enhance intake cooling on turbocharged or supercharged applications.