Tubular Ball Joint Upper Control Arm Kit 2018 chevrolet tahoe ppv esi9939138 After dedicated development and long term 2 Light Mounting Points After dedicated development and long term testing This system uses the Outlaw style mufflers for an aggressive exhaust tone and increased performance These strong black powder coated 4130 chromoly steel arms are a tubular design which allows for more spring and shock clearance and feature greasable polyurethane bushings and heavy duty ball joints for the ideal combination of ride quality and durability with minimal maintenance needed and the improved pivot angles increase wheel travel and reduce stress on the joints