These upgrade kits convert your existing Cheater system into the ultimate in nitrous power--a Big Shot system. The Big Shot utilizes a unique "fogging" plate design to greatly improve nitrous flow, fuel atomization, and mixture distribution. This highly efficient combination can create as much as 400 extra HP. These kits are available for single or dual square bore, sideways-mounted square bore, and single or dual dominator-type carburetors.