DBR, Inc.
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    • Johnson/Evinrude >
      • Sleeves >
        • DBR Johnson/Evinrude 3.0 Liter Finger Port B-Spec Sleeve
        • DBR Johnson/Evinrude 3.3 Liter B-Spec Sleeve
      • Pistons >
        • DBR 3.3 Liter B-Spec Piston
      • Pyros
      • Pyro Studs
      • RWF Heads >
        • DBR 3.0 Liter RWF Head
        • DBR 3.3 Liter RWF Head
      • E-Tec Slide Intake
    • Mercury >
      • ECU Reprogramming & Performance Kits >
        • OPTIMAX 300XS ECU Reprogramming & Performance
      • Cowlings and Vents
  • Services
  • Flash My Merc ECU
    • ***Download Release Form Here***
  • Technical 101
    • 300X vs 300XS
    • Engine Combustion Pressure Analysis
    • ECU Re-Mapping 101
  • About Us
    • Our Dyno
  • Contact Us
    • Links and Affiliates
    • For Sale

DBR Johnson/Evinrude Sleeves

Port timing is the camshaft of a two-stroke. Please feel free to read the information in the technical section about port timing. At DBR, we have developed sleeves that work in the real world on fast boats. All sleeves are designed and built using CAD/CAM technology providing smooth ring transition across port openings. The sleeves are machined from the finest gray stress relieved cast iron available. We have spent years developing these porting specs and the results speak for themselves.

Custom sleeve designs are available. These are made in small quantities and are expensive. Please call if this is a choice you would like to make.
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Johnson/Evinrude 3.0 Liter Finger Port B-Spec Sleeve
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Johnson/Evinrude 3.3 Liter B-Spec Sleeve
Go Back to Johnson/Evinrude Products
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  • Winning
  • Products
    • Electronics
    • Johnson/Evinrude >
      • Sleeves >
        • DBR Johnson/Evinrude 3.0 Liter Finger Port B-Spec Sleeve
        • DBR Johnson/Evinrude 3.3 Liter B-Spec Sleeve
      • Pistons >
        • DBR 3.3 Liter B-Spec Piston
      • Pyros
      • Pyro Studs
      • RWF Heads >
        • DBR 3.0 Liter RWF Head
        • DBR 3.3 Liter RWF Head
      • E-Tec Slide Intake
    • Mercury >
      • ECU Reprogramming & Performance Kits >
        • OPTIMAX 300XS ECU Reprogramming & Performance
      • Cowlings and Vents
  • Services
  • Flash My Merc ECU
    • ***Download Release Form Here***
  • Technical 101
    • 300X vs 300XS
    • Engine Combustion Pressure Analysis
    • ECU Re-Mapping 101
  • About Us
    • Our Dyno
  • Contact Us
    • Links and Affiliates
    • For Sale