My 7m made 300whp at 11psi with the only mods being a 50 trim ct26, k&n drop in fliter, and an exhaust system (stock elbow), and a boost controller.
Then it made 370whp/395tq at 20psi after I upgraded the intercooler, 550's, elbow, and added the origional maft with the 3" gm maf in the...