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Holley Vacuum Secondary Diaphragm 135-6 Carburetor Model Numbers R3659/R4365-1/R4382-1/R4383-1/R4393-2/R4394-2/R4671/R4672/R4789/R4790
1979-1979 Mercury Cougar
1967 Chevrolet C10 Panel CID 364 CC 5967 6
Viton O-Ring Included
High-Quality Injection Molded Construction
COMP Cams Performance Street Beehive Valve Spring - 0.959 in / 1.061 in OD (Set of 16) Videos & Software Holley Vacuum Secondary Diaphragm 135-6With a . 550" maximum lift, these Beehive Valve Springs were designed for Ford 4. 6L and 5. 4L Modular 2 and 3 Valve engines. COMP Cams Beehive Valve Springs deliver increased valve train stability and a much lighter valve train. This is achieved with less spring pressure for better valve control and reduced weight of both the spring and retainer. The unique Beehive shape handles valve train stress more efficiently to eliminate damaging harmonics and
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