COMP Cams · New
COMP Cams Rocker Arms GM LS3 1.8 3/8 Ultra
MPN 1676-16 · Store SKU cca1676-16
Supplier stock checked 11/7/2026, 4:35:58 PM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
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Product details
New LS-Specific Ultra Pro Magnumâ„¢ Rocker Arms From COMP Cams Increase Ratio And Stiffness Over Stock Rockers, While Also Increasing Lift without The Need To Swap Cams. As LS engines continue to grow in popularity, COMP Cams has expanded its line of Rocker arms to build components specific to LS Applications. LS3/L99/L76 - Rectangle Port Head LS Applications Set Of 16 Stud Mount Rockers - Includes Poly Locks - Requires 3/8" Studs & Guide Plates - GM LS Flat - 5/16" Pushrod Diameter 1.8:1 Ratio These Ultra Pro Magnum rockers are made of black oxide coated 8650 chromemoly steel that can withstand up to 850 lbs of spring pressure. Featuring a 1.8 ratio, these rockers fit LS3 with a 3/8" diameter stud. Ultra Pro Magnum 1.8 Ratio Rocker Arm Set for GM LS3 w/ 3/8" Stud
Manufacturer fitment & guides
Check 1676-16 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
