Auto Ventshade Front / Rear In-Channel Ventvisor - Stick-On - Dark Smoke - Crew Cab - GM Fullsize SUV / Truck 2007-13 R07C04S All tubes are CNC mandrel

All tubes are CNC mandrel bent for optimal flow

Superlite IIA Caliper

Use w/AMC 290/304/343/360/390/401 cu

This tells the ECU which cylinder is cylinder #1 (or the first cylinder in the firing order as entered in the software)

Auto Ventshade Front / Rear In-Channel Ventvisor - Stick-On - Dark Smoke - Crew Cab - GM Fullsize SUV / Truck 2007-13 R07C04S All tubes are CNC mandrelAVS In channel Ventvisors offer a sleek profile that helps keep rain out and lets fresh air in to reduce interior heat build up. It's easy no drill application makes installation and provides a custom fit for your vehicle. Circulate fresh air through your cab to sweep away stale, stubborn odors from things like pets, smoking or athletic bags, all while keeping weather and road debris out. Constructed with high grade UV resistant acrylic material