ALUMINUM PERFORMANCE COLD AIR EXTENSION KITS Carefully engineered for a perfect fit Show-quality looks and finish Constructed of light-weight aluminum alloy Tig welded bracketry and rubber vibra-mount for extra support Crafted from T-606 to ensure the lightest design possible. In addition cold air intake extension includes a welded bracket for a secure fit. The diameter of tubing is custom formed ensuring the best possible airflow.