The DAWES manual boost controller is run on the Buick Nationals that run in the 9's.BTY that's a V6 just like the Z..... I use the same one with a boost guage and have NO problems with it , I've also used the Greddy and the Blitz.. The Dawes uses a cermaic ball so the boost comes on faster..Cost $43 great for the Z.... and you only need one with a T connector.