Engineered to provide superior filtration for diesel engines, these exclusive System 1 600 series billet aluminum housings are 3 3/4” wide by 5 1/4” long and designed to replace OEM spin-on filters. They come with 35 micron removable stainless steel elements and are easily cleaned. Plus, they provide “tattle tale” analysis of your engine without the hassles and mess of cutting disposable filters apart. Long-term savings are quite impressive, too!