Upgrade your boosted setup with these 3.5" billet aluminum water/methanol Boost Cooler Rings. Engineered for easy installation, these rings fit seamlessly in line with your cold side intake piping using standard 3.5" silicone couplers—no welding required. Each ring features four 1/8" NPT ports spaced every 90 degrees, allowing you to add water/methanol injection nozzles exactly where you need them. Built from billet aluminum for strength and durability, these rings provide a secure, leak-free solution to cool your charged air and help optimize performance under boost.