Oval Short 4-Barrel Scoop Air Cleaner. Improved version of an old air cleaner of unknown origin made from brand new tooling. Highly polished on all outside surfaces. Comes with 6-3/8" x 2-1/2" lifetime element, sheetmetal element cover, 1/4-20 threaded rod, bushing, stainless steel washer, and acorn nut. Fits all modern 4-Barrel carbs with 5-1/8" carb neck. Height 4-3/4", width at front 9", length 8-3/4". If you want to use two for an inline two 4-Barrel setup, the carbs would have to be at least 8 3/4" apart center to center - unless the rear air cleaner was mounted on a 4 1/2" riser, in which case a 6-1/2" center to center spacing would be OK. If you are running a cross-ram with the carbs side-by-side, you will need a 9-1/4" center-to-center spacing minimum. Fully polished air scoop.