Proheader TCA-6772UL - GM Abody Chevy Chevelle Tubular Upper & Lower Control Arms These are the tubular control arms you have been asking about. and improved! These arms are powder coated, include bump stops and have improved ball joint clearances. A-body tubular upper and lor control arm set is now available at the most competitive price around. ; Improves handling and performance! These are the Authentic original UPPER and LOR tubular control arms!! Ready to install and GO! Works with stock coils or coil over springs. HUGE TUBE DESIGN FOR LESS DEFLECTION. Lors are 1.500" OD - .156 wall DOM tubing