Most typical vehicles will receive approximately 3 rear wheel horsepower but several tests have been reported to show as much as 5 horsepower on some applications. For those who are interested in running nitrous oxide, we have cast a special nitrous boss into each C&L inlet pipe to give you a solid location to drill and tap your nozzle into. Due to the fact that these pipes are solid aluminum and are mounted directly to the engine, we do not recommend mounting the mass air flow unit (through a bracket) to the body of the vehicle. When using an aftermarket intake that relocates the throttle body away from the stock position, it may be necessary to make minor modifications for proper fit.