Review on 🚀 Rough Country Throttle Body Spacer - 1999-2006 Chevy/GMC 1500-1196 by Joshua Days

Tight fitting. The bypass hose on the underside of the throttle body had to be adjusted to allow enough clearance for it to fit properly. They also fit well in the gutter. I had to rotate the clamp. Installed on a 2005 GMC Sierra running 5.3. The spacer works great. Noticeable increase in performance. I've heard some people say he whistles. If this happens to your car, it is a vacuum leak and you will need to tighten the mounting bolts. There is no whistle here.