Ultra Pro Magnum Roller Rocker Arms - Bolt-OnSuit GM LS3/L99/L76/L92 Rectangle PortHeads 1.8 RatioBrand: COMPPart Number: CO1678-16Description: As 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 Magnum 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 rocker's 1.7) and utilize a roller tip instead of a slider. The higher ratio and increased stiffness make theserockers 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. Therockers 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 Mangum Rockers Arms are available forLS1, LS2, LS3, LS6 and LS-based truck engines and come in individual sets or kits featuring studs and guideplates. Kits do not include pushrods, but they are available separately.
- Increased (1.8) ratio & stiffnessmake rockers a great option for increasing lift w/o changing cams
- Investment-cast 8650 chromemoly steel body creates components stronger, stiffer & more durable than stock
- Increased stiffness, upgraded trunnion & roller wheel make rockers perfect for aftermarket valve springs
- Two designs available - bolt-down using stock rocker stands & and stud-mount for adjustable valve trains
- For use with up to 850 lbs of open spring pressure!
