Review on 🔧 Airaid Throttle Body Spacer 200-512-1 for 99-06 Silverado 4.8, 5.3, and 6.0L Engines by Isaac Shankar

Installed on a Suburban, I used to have one on an Impala. I didn't expect any change in mileage, and of course there wasn't. There was a slight increase in performance in the low and midrange that I was looking for. Four stars because they always advertise improved fuel efficiency and again that hasn't changed anything. Setup was a little frustrating, but that was because I was working in low light and cramped conditions.