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Ultra Pro Magnum XD Rocker Arms Small Block Chevy 265-400
InfoVehicle Info Needed
COMP CAMSPART NUMBER: 249-1803-16

Ultra Pro Magnum XD Rocker Arms Small Block Chevy 265-400

$64195
ShippingShips on 10/20/2026
Lowest PriceLowest Price Guarantee
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$48196
Stainless Steel Roller Rocker Arms for Small Block Chevy [1.6 Ratio, 3/8 in. Stud]

555-20923

Stainless Steel Roller Rocker Arms for Small Block Chevy [1.6 Ratio, 3/8 in. Stud]

$15999

Small Block Chevy 265-400
    Ultra Pro Magnum XD Rocker Arms
  • Small Block Chevy 265-400
  • 1.65 Ratio
  • 3/8" Stud
  • 16/pkg

  • 8650 Steel Construction
  • Outlasts And Outperforms Other Rockers
  • Unique Machined Billet Pushrod Seat
  • FEA And CAD Development
  • Improved Strength And Stiffness
  • Rebuildable Design
  • Engineered For Use In Endurance/Circle/Drag Race
  • Lifetime Warranty

    265, 283, 307, 302, 305, 327, 350, 383, 400, 427, L46, L48, L65, LM1, LT-1, L82, L81, LS9, L83, L98, L05, LG3, LG4, LT1, LT4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice, Malibu, Impala, Nova, 355, GEN1, Monte Carlo, S10


    Machined from 8650 steel with a billet pushrod seat insert, these Ultra Pro Magnum XD rockers can handle up to 1,000 lbs of spring pressure. These 1803 rockers feature a 1.65 ratio for use with 3/8" stud Chevrolet 265-400 Small Block.
Part TypeRocker Arm
BrandCOMP CAMS
Package Height3.75
Package Width4.0
Package Length13.0
Weight9.18 PG
Part CategoryPerformance Parts
Arm FinishBlack oxide
Rocker Arm Ratio1.65
Shims IncludedNo
Stud Size 3/8
Rocker Arm Nut StylePolylock
QuantitySold as a set of 16
Rocker Arm Mounting StyleStud
Engine Make/SizeChevy Small Block (265-400)
Self-AligningNo
Rocker Arm StyleFull roller
Rocker Arm Body StyleStandard
Arm MaterialChromoly steel
Ratio1.65
Vendor Part Number1803-16
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
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