Excerpt: When we first unboxed the RIDGE WASHER 16-Inch Undercarriage Cleaner, we were curious how its size would stack up against the raw power of 4000 PSI. We laid out our vehicle, bracing for the showdown. Holding the straight extension wand steady, we switched on the pressure washer and aimed it at the grime-caked undercarriage. The 16-inch width worked wonders, covering more surface area than smaller nozzles, and the 4000 PSI delivered a satisfying, high-pressure blast that cut through years of built-up gunk. The straight wand offered precise control, reaching tight spots with ease. We were impressed by how efficiently the combo tackled even the toughest dirt without damaging sensitive components. The cleanup was swift, and the results were visibly pristine. It’s clear that this 16-inch washer paired with 4000 PSI isn’t just strong—it’s smart.