yes, it would lower boost. It would be a great starter pulley for someone with a gen 5 top swap or top swap in general.
Thank You Sir. Learn something new everyday.
Goldie 98 Topaz Gold GTP (retired)/ Shadow 06 GTO 6.0 Phantom Black Metallic- traded in. Now cruising a 2005 GMC Sierra 2500 HD 4x4 with the always fun 6.0L