Made in USA
Polished Aluminum Valve Cover Breather
InfoVehicle Info Needed
OFFENHAUSERPART NUMBER: 750-3661JR

Polished Aluminum Valve Cover Breather

$7424
ShippingShips on Sep 17, 2026
Lowest PriceLowest Price Guarantee

Valve Cover Breather
  • Fits Most Stock Valve Covers
  • Approximately 2 in. Wide x 1-1/4 in. High
  • Polished Aluminum Construction
  • Includes: Gasket
  • Sold Individually

    Offenhauser 3661JR Valve Cover Breather provides compact crankcase ventilation for applications where a low-profile breather is preferred. Its polished aluminum construction adds a traditional performance appearance while helping relieve pressure in the valve cover.

    Offenhauser 3661JR Features:

    • Designed to relieve crankcase pressure through the valve cover
    • Fits most stock-style valve covers
    • Approximately 2 in. wide at the top
    • Approximately 1-1/4 in. high
    • Polished aluminum construction

    Offenhauser 3661JR Includes:

    • Breather
    • Gasket

    Offenhauser 3661JR Notes:

    • Custom finned valve covers may require fin clearance for installation
  • Part TypeCrankcase Breather
    BrandOFFENHAUSER
    Package Height1.25 in.
    Package Width2 in.
    Package Length5.3
    Weight0.15 PG
    Part CategoryPerformance Parts
    Part TypeCrankcase Breather
    QuantitySold Individually
    MaterialAluminum
    Part FitmentUniversal
    FinishPolished
    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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