Designed for street performance, drag race, and handling, and pro-touring applications, BMR lower A-arms are engineered to provide 2 additional degrees of positive caster for increased high-speed stability. Combine with BMR Upper A-arms, and you get 4 additional degrees of positive caster (2 degree from the uppers and 2 degrees from the lowers), providing up to 6 degrees of total positive caster over stock. This gives you improved geometry and increased lateral grip during cornering situations.BMR's suspension AA006 Non-Adjustable Lower A-arms are available in black hammertone and red powdercoat for long-lasting good looks. Installation time is 3-4 hours. Proudly made in the U.S.A.Control arm hardware kit RH006 (Includes upper and lower control arm hardware - Highly Recommended) also available.1967-69 F-Body cars had varying bumpstop locations.Generally speaking 1967 model year cars had bumpstops located on the front sub-frame which made contact with the lower A-arm.Cars made during the 1968 model year had bumpstops located on the front side the lower A-arm.Cars from 1969 model year usually had bumpstops located on the rear side of the A-armThis specific A-arm is designed for cars with the bump stops located on the front of the A-arm.BE SURE TO INSPECT THE LOCATION OF THE BUMPSTOP LOCATION ON YOUR SUB-FRAME BEFORE ORDERING.Control arm hardware kit RH006 (Includes upper and lower control arm hardware - Highly Recommended) also available.