(1) Ultra Pro Magnumª Roller Rockers - Bolt Down - GM LS3/L99/L76/Rectangle Port Heads

For LS3/L99/L76 - Rectangle Port Head LS ApplicationsSingleÊBolt DownÊRocker -ÊIncludes Bolt1.8:1 RatioNew LS-Specific Ultra Pro Magnumª Rocker Arms From COMP Cams¨ÊIncrease Ratio And Stiffness Over Stock Rockers, While Also Increasing Lift Without The Need To Swap CamsAs LS engines continue to grow in popularity, COMP Cams¨ has expanded its line of rocker arms to build components specific to LS applications. New Ultra Pro Magnumª Rockers are made from investment-cast 8650 chromemoly steel, utilize upgraded trunnions and needle bearings over stock and are stronger, stiffer and more durable than the stock parts. They also feature a 1.8 ratio (compared to the stock rockersÕ 1.7) and utilize a roller tip instead of a slider. The higher ratio and increased stiffness make these rockers a great option for increasing lift without changing cams. This increased stiffness, along with the upgraded trunnion package and roller wheel, also makes them a perfect choice when running aftermarket valve springs. The rockers are available in a bolt-down design that uses stock rocker stands and in a stud-mount option for customers looking for an adjustable valve train. The stud-mount version is perfect for individuals running mechanical lifters as well. COMP Cams¨ LS Ultra Pro Mangumª Rockers Arms are available for LS1, LS2, LS3, LS6 and LS-based truck engines and come in individual sets or kits featuring studs and guide plates. Kits do not include pushrods, but they are available separately.Increased (1.8) ratio & stiffness make rockers a great option for increasing lift w/o changing camsInvestment-cast 8650 chromemoly steel body creates components stronger, stiffer & more durable than stockÊIncreased stiffness, upgraded trunnion & roller wheel make rockersÊ perfect for aftermarket valve springsTwo designs available Ð bolt-down using stock rocker stands & and stud-mount for adjustable valve trainsAvailable in individual sets or Êkits forÊ LS1, LS2, LS3, LS6 & LS-based truck applicationsÊLimited Lifetime Warranty - So strong that we guarantee the rocker bodies against breakage for life. ForÊuse withÊup toÊ850 lbs of open spring pressure!ÊUltra Pro Magnumª GM LS RockersÊPart #ÊLS3 - RectangleÊPort HeadsÊUltra Pro Magnumª GM LS Rockers (16) - Bolt-Down1678-16Ultra Pro Magnumª GM LS RockersÊ(16) - Stud Mount1676-16Ultra Pro Magnumª GM LS Rockers (16) - Stud Mount Kit w/ Studs & Guide PlatesÊÊ 16765-KIT ÊÊLS1/LS2/LS6 - Cathedral Port HeadsÊUltra Pro Magnumª GM LS RockersÊ(16) - Bolt-Down1677-16Ultra Pro Magnumª GM LS RockersÊ(16) -ÊStud Mount-Ultra Pro Magnumª GM LS Rockers (16) - Stud Mount Kit w/ Studs & Guide PlatesÊÊÊ 16755-KIT