For the stock 75MM LS throttle body, we ultrasonically clean the throttle body, CNC cut the entry to allow a smoother transition into the throttle bore, which results in a crisper throttle response and an additional 5-8rwhp at wide open throttle. This is a great upgrade while still retaining a completely stock look. THIS IS A SERVICE, YOU WILL NEED TO SEND US YOUR COMPLETE THROTTLE BODY. For bigger LS motors, check out our 90MM LS bodies.