Engine Saver; Pre-Filter Screen; SBC/BBC/90 Deg V6 Chevy Blocks w/Spin On Oil Filters; 304 Stainless Steel Screen; • Fits all Small Block, Big Block, and 90° V6 Chevy engines with spin-on oil filters • Unique stainless steel screen locates on top of spin-on oil filters to trap debris before it enters the filter element undetected • Particulate matter trabbed in the screen and detected during periodic inspections serves as an "early warning signal" for impending engine failures • 304 stainless steel filtration-grade screen traps contaminants down to the 280 micron range without affecting oil flow or oil pressure • Crimped rings at both outside and inside diameters provide increased strength and extended durability • Designed in cooperation with Jomar Racing Engines