They work well and are easy to fit, but they made my 17 Silverado front wheels rub a lot on the front end. So bad I couldn't back my truck out of the driveway. If you don't want to get rid of ground effects, they don't work!
Pros
✔ Wheel Spacers 6x139.7 to 6x139.7 Increased Stability and Handling: Extend your vehicle's wheelbase, increasing overall stability and providing better handling.