These 2.5" billet aluminum water/methanol Boost Cooler Rings mount in line with your cold side intake piping providing a secure and attractive way to cool your boosted air charge. These are designed to use 2.5" silicone couplers to add these in line with your charge pipe, no welding needed! Simply add your nozzle(s) in the 1/8" NPT ports placed around the ring every 90 degrees. (4 ports total).