If you have an original translator or translator plus you will ned to buy an update chip with the transfer function of the new sensor/pipe in it. If you buy a new one it will be installed already. If you have a Gen2 or Pro there is a free software update on our tech board. You get a choice of a 4" hose or a 3 to 4 adaptor to install on turbo, you will need a harness to connect for plug and play, the translator one for the original translator or plus, the sensor to Buick one for Gen 2 or Pro. If you call and place the order will be sure you get the right items but it is not too tough
Mike