We have 2 Mercury Racing 575 Supercharger setups for sale. These came on the Mercury 575SCi marine big block chevy engines. The price in the ad is for 1 setup but 2 setups are available. The blowers are in excellent shape but unfortunately the intake manifolds were rotten beyond repair so you will need to purchase intakes separately. The setups will come with the supercharger, throttle bodies, computers, wiring harness, pullies and flame arrestors. The intakes for these can be purchased from blowershops.