PRW Stainless roller rocker arms, 1.7 ratio, 7/16" stud.  PRW Stainless Steel Rockers incorporate an exceptional lightweight design that provides plenty of clearance for large diameter springs. These are manufactured from premium quality 15-5 PH stainless steel, a superior alloy that is high in Nickel and Chromium. This rigid premium material provides high yield strength to help resist deflection and has extraordinary fatigue resistance. The stud mount models feature full-cage friction reducing needle bearings. The nose rollers and shafts are Cr40 steel, heat-treated and hardened to resist the severity of racing and to minimize "scrubbing". Each rocker body is hand -polished, assembled and carefully inspected to provide our customers with some of the finest quality rocker arms available to the racing and performance industry. Designed for higher open valve spring pressures Specially cast and machined for larger valve springs and retainers Oversize trunions and full roller precision needle and cage bearings CNC machined pushrod cups and heat-treated Cr40 roller tips Internal oiling system for long lasting performance PRW RockerLocs® included PRW Stainless roller rocker arms, 1.7 ratio, 7/16" stud.  PRW Stainless Steel Rockers incorporate an exceptional lightweight design that provides plenty of clearance for large diameter springs. These are manufactured from premium quality 15-5 PH stainless steel, a superior alloy that is high in Nickel and Chromium. This rigid premium material provides high yield strength to help resist deflection and has extraordinary fatigue resistance. The stud mount models feature full-cage friction reducing needle bearings. The nose rollers and shafts are Cr40 steel, heat-treated and hardened to resist the severity of racing and to minimize "scrubbing". Each rocker body is hand -polished, assembled and carefully inspected to provide our customers with some of the finest quality rocker arms available to the racing and performance industry. Designed for higher open valve spring pressures Specially cast and machined for larger valve springs and retainers Oversize trunions and full roller precision needle and cage bearings CNC machined pushrod cups and heat-treated Cr40 roller tips Internal oiling system for long lasting performance PRW RockerLocs® included