The AIRAID LS Air Filter is specially designed for vehicles with an LS engine swap and addresses many of the unique induction needs of an LS swap. The air filter clamps right on to the throttle body of the LS engine. The LS Air Filter is available with a standard 3.875 inch flange to match a factory throttle body, or with a 4.25 inch flange that is compatible with the majority of aftermarket throttle bodies. The filter features an extra-thick flange to better withstand heavy vibrations and a built-in velocity stack to increase airflow. Some LS Air Filters have a built-in provision to mount an intake air temperature sensor on the filter assembly, which is commonly needed on LS applications. The filter is sized to provide excellent air flow to the engine while maintaining a compact footprint to work within tight engine compartments. Some LS Air Filters also offer an optional shield to help protect the filter from dirt and debris while further reinforcing the filter mount.Features: Made specifically for LS engine swaps Clamps directly onto the LS engine throttle body Available in 3.875 or 4.25 inch flange sizes Compact design gives more options in tight engine compartments AIRAID premium filter is washable and reusableProduct Specifications: Air Filter Color: Red Air Filter Large End Diameter: 7 in (178 mm) Air Filter Material: Cotton Gauze & Non-woven Synthetic Air Filter Shape: Tapered Conical Base Outside Diameter: 7 in (178 mm) Flange Inside Diameter: 3.875 in (98 mm) Flange Length: 2.25 in (57 mm) Flanges: 1 Height: 6 in (152 mm) Package Contents: 1 Air Filter Package Quantity: 1 Product Box Height: 10.3 in (262 mm) Product Box Length: 8.7 in (221 mm) Product Box Width: 8.7 in (221 mm) Product Style: Airaid Universal Cone Filter Top Outside Diameter: 5 in (127 mm) Weight 1.1 lb (0.5 kg)Product Description: Air Filter Element, Clamp-On, Conical, 7 in Base, 5 in Top Diameter, 6 in Tall, 3.875 in Flange, Reusable Cotton, GM LS-SeriesPit Stop USA offers AIRAID LS Air Filter - Conical - 3.875" Flange I.D. - 7" Base x 5" Top x 6" Height 700-581 at low everyday prices. Be sure to check out all our products from AIRAID including AIRAID Air Filter Elements.