The Lone Star Racing Upper Rear A-Arm Gusset is designed to prevent cracking on the OEM frames where the upper A-Arms mount in the rear. This is a common failure on stock frame cars.
While we try to keep product in stock, unfortunately we aren’t able to keep all products on the shelf at all times. We do ask that if you are needing to order a product that is time sensitive that you call us at 1-800-4LS-RACE and check stock/eta on that part before proceeding. We also have distributors that might have the part you are looking for in stock and we can point you in that directions.