Ultra Strong Bolt On Shock Tower Made from Ultra Strong 2024 Alum. Solid, but still weighs in at 1.8 lbs. Anodized black for long lasting good looks. Direct replacement for our CHA 100BO steel bolt on shock tower. Fits all cars, but will need holes drilled in some applications. Pre-drilled for quick replacement at the track or shop. Bolts and seals for rear end are not included.