Four BBL Spark Arrester Style air cleaner using a custom made cotton gauze washable lifetime element. Available for 4 BBL carbs with 5 1/8" necks. Comes with a stud (provided with SS washer and SS Acorn nut) for installation on any 4 BBL barb with a 5 1/8" neck and center stud.  Note: because these have an element that really acts as a filter to keep your engine clean vs. a corrugated wire screen like an original spark arrester, this is not a USCG approved spark arrester and should not be used on boats as one.

Height is 4 1/8", depth (front to back is 7 1/4" and width is 8 1/4" at the front and tapers down to 3 1/2" at the rear.