Power Valve Plug HLY26-36 Plug blocks the power valve circuit. An increase of 6 to 8 jet sizes is recommended to compensate for the loss of enrichment. Vacuum Gauge HLY26-501 A great tuning aid. Chrome-plated, 2" diameter vacuum gauge reads 0-30 in. HG and includes a male 1/8" NPT fitting. Heat Shield HLY108-70 Aluminum shield is used to insulate the carburetor from the intake manifold to provide improved performance through improved air/ fuel density. Fits all square flange Holley carbs. Complete with gaskets. “Viton” Inlet Needles And Seats Part No. Description Part No. Description 0.078" Seat Size HLY6-508* 0.097" Seat Size HLY6-513 0.097" Seat Size (Off-Road) HLY6-504 0.110" Seat Size HLY6-510 0.110" Seat Size HLY6-518-2 0.120" Seat Size * Premium design. “Steel” Inlet Needles And Seats For High Performance Fuels For use with alcohol, or additives (benzine or acetone). Part No. Description Adjustable Non-Adjustable HLY6-506 0.097" Seat Size HLY6-511
Jet Assortment Kit HLY36-181 The professional way to track-tune a carburetor for top performance. Kit contains two each of 36 different jet sizes, ranging from 64 to 99 pack- aged in a plastic case to keep them separated for easy access. Alcohol Jet Kit HLY36-201 Kit includes four each of 24 jet sizes from .132" to .200". Jets fit only Holley HP series 650, 750 and 950 CFM alcohol carburetors. Packaged in a plastic carrying case. Main Jet Removal Tool HLY26-68 Removes Holley jets without damage.
Main Jet Extensions HLY122-5000 Extensions thread into the metering block. Main metering jets thread into the extensions. The point of fuel entry is moved into the fuel bowl, preventing fuel starvation under hard acceleration. Use a notched float for proper float clearance. Quick Change Jet Kits
Change jets quickly and easily without remov- ing the fuel bowls. Kits fit carburetors with cen- ter hung fuel bowls. Include fuel bowl, gaskets, plugs and jet removal tool (tool included with primary bowls only). Part No. Description HLY34-24
HLY6-501-2 0.097" Seat Size HLY6-500-2 0.110" Seat Size HLY6-502-2 0.120" Seat Size HLY6-515-2 0.130" Seat Size HLY6-519-2 0.150" Seat Size
Model 4500 Dominator, Prim. And Sec. Dual Inlet Fuel Bowls
Titanium Needle And Seat HLY6-521 Large .150" titanium seat is among the largest available anywhere. Very responsive to changes in flow rates, it has superior sealing qualities and is
HLY34-25 Model 4150/4160 Carb, Prim. Fuel Bowl With Single Fuel Inlet HLY34-26 Model 4150 Carb, Sec. Fuel Bowl With Single Fuel Inlet And Accel. Pump HLY26-85 Replacement Fuel Bowl Plugs, Pair
recommended for racing only. Adjustable Needle And Seat Hardware Kit HLY34-7 Includes adjusting nut, locking screw, gaskets and O-rings. Floats Replacement floats are available in nitrophyl or brass. Notched floats for use with jet extensions are also available. Part No. Description HLY116-1 Nitrophyl Side Hung Float, Adjustable HLY116-2 Brass Center Hung Float HLY116-3 Nitrophyl Center Hung Float HLY116-4 Brass Side Hung Float
Single-Stage Power Valves Available in standard and high flow, gasket included. Part No. Description Part No.
Description
Standard Flow
High Flow HLY125-125 HLY125-135 HLY125-145 HLY125-155 HLY125-165 HLY125-185
HLY125-25 2.5" Hg. HLY125-35 3.5" Hg. HLY125-45 4.5" Hg. HLY125-50 5.0" Hg. HLY125-55 5.5" Hg. HLY125-65 6.5" Hg. HLY125-75 7.5" Hg.
2.5" Hg. 3.5" Hg. 4.5" Hg. 5.5" Hg. 6.5" Hg. 8.5" Hg.
HLY125-1005 10.5" Hg.
HLY125-85 8.5" Hg. HLY125-95 9.5" Hg. HLY125-105 10.5" Hg. Power Valve Check Valve Kit HLY125-500
HLY116-10 Notched Float With Two Main Jet Extensions HLY116-11 Notched Float Without Main Jet Extensions HLY216-43 Nitrophyl Side Hung Float, Non-Adjustable Float Hanger Hardware Kit HLY20-105 Hardware for float installation. Fuel Bowl Vent Baffle HLY26-89 Baffle is 1-7/16" long, and prevents fuel from splashing out of the vent tube.
Power valve “blow- out” protection can now be added to older model 2300, 4150 and 4160 carbs. Kit in- cludes a spring, brass seat, check ball and instructions.
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