Hi-Tech? Stainless Steel Rockers are the toughest rockers in racing. That's why they're the choice of professional racers. We use 15-5 PH stainless steel - a premium alloy that's high in nickel and chromium. This superior material gives Hi-Tech? Rockers outstanding yield strength and exceptional fatigue resistance. Our stainless rocker arms are extra rigid (tested at 52, 000 pounds/inch) to resist power-robbing deflection. Hi-Tech? Rockers are engineered to minimize reciprocating weight that means more rpm and longer valve train life. They're designed for race-winning durability, too. Our engineers specified extra large trunions and more needle bearings to spread out the load and reduce wear. Hi-Tech? Stainless Steel Rockers are available in ratios to suit every camshaft profile. Our stainless rockers are rebuildable, too. They're an investment that pays big dividends in performance and dependability.Rebuildable Design For Extended Service Life15-5 PH Stainless Steel Delivers exceptional Fatigue ResistanceExtra Rigid Design Tested To 52, 000+ Pds/Inch For Extreme ApplicationsOversized Trunions & Additional needle Bearings To Better Distribute LoadsPit Stop USA offers Comp Cams Hi-Tech™ Stainless Steel Rocker Arms (16) - SB Ford V8 289-302-351W - 7/16" Stud - 1.6 Ratio 1832-16 at low everyday prices. Be sure to check out all of our products from Comp Cams including Comp Cams Steel Roller Rocker Arms - Small Block Ford.