Holley 6-504 Inlet Needle Viton Adjustable 0.110" Seat Size
$25.00
HOL-6-504
Floats, Bowls, Fittings - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4500 Dominator Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Inlet Needle Viton® Tip Adjustable 0.110" Seat Size. Brand Holley Category Air and Fuel Delivery Emission Code 5 Grade Type Performance Needle Material Viton...
Holley Single-Stage Power Valve Sizes 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5
$26.50
HOL-125-25
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Four Barrel 4500 Dominator Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Holley Twin Barrel Misc Carburettor Parts
Metering Blocks & Parts - Holley Tuning Parts
Genuine Holley Power Valves Single-stage power valve for Holley performance carburettors Available in multiple vacuum ratings from 2.5 to 10.5 Restores correct power enrichment...
Holley Main Jets Pair Choose Sizes 50 thru 99
$18.00
122-50
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Four Barrel 4500 Dominator Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Jets, Air Bleeds, Boosters - Holley Tuning Parts
Sold as a matched pair for consistent tuning across dual fuel bowls Precision Holley main jets available in sizes 50 through 99 Suits Holley...
Holley 135-5 Accelerator Pump Diaphragm 30cc Rubber w/o Screws
$16.95
HOL-135-5
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Pumps, Cams, Nozzles - Holley Tuning Parts
30cc accelerator pump diaphragm (black) Rubber w/o Screws Brand Holley Category Air and Fuel Delivery Diaphragm Material Rubber Emission Code 5 Grade Type OEM...
Holley Main Jet Kit - Sizes 60 through to 69
$125.00
HJK-60
Edelbrock Twin Barrel Carburettor Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Holley Twin Barrel 94 AA-1 2100 2110 Carburettor Parts
Jets, Air Bleeds, Boosters - Holley Tuning Parts
10 Pairs of Jets - Includes jet sizes from 60 to 69 for tuning flexibility. Precision Machined - High-quality brass jets for consistent fuel...
Holley 45-225S Manual Choke Conversion Kit (Shiny) 2300, 4150, 4160 Carbs
$95.00
HOL-45-225S
Choke & Vacuum Secondary Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Twin Barrel 2300 Carburettor Parts
Manual Choke Conversion Kit – Converts electric or automatic choke Holley carbs to manual hand choke operation. Includes All Required Parts – Complete with...
Holley 135-7 Accelerator Pump Diaphragm 50cc Rubber w/o Screws
$26.50
HOL-135-7
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Four Barrel 4500 Dominator Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Pumps, Cams, Nozzles - Holley Tuning Parts
Carburetor Diaphragm Diaphragms 50cc (black) Rubber w/o Screws Brand Holley Category Air and Fuel Delivery Diaphragm Material Rubber Emission Code 5 Grade Type OEM...
Holley 135-4 Vacuum Secondary Diaphragm
$25.95
HOL-135-4
Choke & Vacuum Secondary Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Vacuum Secondary Diaphragm. Rod length is 2.054"Fits Carburetor Number: R1849-50 R3310 R4452-1 R4548 R6520 R6619 R6909-19-79-89 R7002-04-05-06-09-10-53-1 R7154/R7351-97 R7855 Brand Holley Category Air and...
Holley 34-7 Gold Needle & Seat Adjusting Nut & Lock Screw
$14.95
HOL-34-7
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4500 Dominator Carburettor Parts
Holley Twin Barrel 2300 Carburettor Parts
Gold Needle & Seat adjusting nut & lock screw Gold adjusting nut and gasket Gold lock screw and gasket Brand Holley Category Air and...
Holley 26-13 Fuel Bowl Sight Plug & Gasket Kit
$16.50
HOL-26-13
Floats, Bowls, Fittings - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4500 Dominator Carburettor Parts
Holley Twin Barrel 2300 Carburettor Parts
Fuel Bowl Sight Plug & Gasket Kit Standard Replacement Two Gaskets Fits All Holley Carburetors Two Brass Sight Plugs Brand Holley Category Air and...
Holley 20-13 Secondary Diaphragm Spring Kit
$45.00
HOL-20-13
Choke & Vacuum Secondary Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Allows changing the rate of the secondary operating ranges Secondary Diaphragm Spring Kit Adjustable Length No Brand Holley Category Air and Fuel Delivery Color...
Fuel Fitting 3/8" Straight
$18.00
FF38ST
Carter Four Barrel 4BBL Carburettor Parts
Carter Four Barrel AFB Competition Carburettor Rebuild Parts
Edelbrock Four Barrel Carburettor Parts
Fuel Rails & Fittings
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Twin Barrel 2300 Carburettor Parts
Rochester Quadrajet Carburettor Parts
Rochester Twin Barrel Marine Carburettor Rebuild Kits
Fits Holley 2 barrel carburettors and Strombergs 3/8 inch outer diameter tube with 5/8 inch UNF thread Double flared for superior sealing and durability...
Holley Main Jet Kit Size 50 to 59
$125.00
HJK-50
Edelbrock Twin Barrel Carburettor Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Holley Twin Barrel 94 AA-1 2100 2110 Carburettor Parts
Jets, Air Bleeds, Boosters - Holley Tuning Parts
Genuine Holley main jet set ranging from size 50 to 59 Ideal for tuning and jetting Holley 2 barrel and 4 barrel carburettors Precision-machined...
Holley Main Jet Kit Size 70 to 79
$125.00
HJK-70
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Four Barrel 4500 Dominator Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Jets, Air Bleeds, Boosters - Holley Tuning Parts
Comprehensive jet set covering Holley sizes 70 to 79 Perfect for performance tuning across a wide range of engines Precision machined and clearly stamped...
Needle and Seat Repair Kit with Drill, Tap & Repair Inserts For Holley Fuel Bowls
$245.00
HRK-01
Carburettor Tools
Floats, Bowls, Fittings - Holley Tuning Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4500 Dominator Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Holley Twin Barrel Misc Carburettor Parts
Needle and Seat Thread Repair Kit For Holley Carburettors Repairs stripped fuel bowl threads - Restores damaged Holley needle and seat threads without replacing...
Quick Fuel Quick Change Secondary Diaphragm and Spring Kit 38-1000QFT
$85.00
38-1000QFT
Choke & Vacuum Secondary Parts - Holley Tuning Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Tuning Parts & Kits
Quick spring access - Designed for easier vacuum secondary spring changes. Assorted springs included - Useful for tuning secondary opening rate. Tuning-friendly design -...
Holley 26-41 Pump Check Valve Umbrella Qty 2 Suit Holley Quickfuel Carburettors
$21.50
HOL-26-41
Floats, Bowls, Fittings - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Four Barrel 4500 Dominator Carburettor Parts
Holley Twin Barrel 2300 Carburettor Parts
Holley Twin Barrel Misc Carburettor Parts
Pumps, Cams, Nozzles - Holley Tuning Parts
Umbrella check valves help the accelerator pump circuit seal correctly for crisp off-idle response. Replacing tired valves can reduce hesitation and help the pump...
Holley Quick Fuel 47-1QFT Electric Choke Cap Cover H85
$45.00
H85
Choke & Vacuum Secondary Parts - Holley Tuning Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Holley Twin Barrel Misc Carburettor Parts
Electric choke unit restores reliable cold-start operation on compatible carburettors. Steady choke opening helps prevent loading up when cold and improves warm-up drivability. A...
Fuel Fitting 3/8" 90 Degree
$25.00
FF3890
Carter Four Barrel 4BBL Carburettor Parts
Carter Four Barrel AFB Competition Carburettor Rebuild Parts
Edelbrock Four Barrel Carburettor Parts
Floats, Bowls, Fittings - Holley Tuning Parts
Fuel Rails & Fittings
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Twin Barrel 2300 Carburettor Parts
Rochester Quadrajet Carburettor Parts
Rochester Twin Barrel Marine Carburettor Parts
90 degree elbow fuel fitting for Holley 2 barrel and Stromberg carburettors 3/8 inch outer diameter fuel tube with 5/8 inch UNF thread Double...
30/50cc Pump Cam - Pink Narrow
$14.50
HP12-44
Base Plates & Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Pumps, Cams, Nozzles - Holley Tuning Parts
HOLLEY ACCELERATOR PUMP CAM PINK NARROW FOR ANY HOLLEY 2BBL 2300 SERIES, OR ANY 4BBL HOLLEY 4160 4150 or 4150 hp Holley Carburettors Speed...
30/50cc Pump Cam - Blue
$14.50
HP12-40
Base Plates & Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Pumps, Cams, Nozzles - Holley Tuning Parts
HOLLEY ACCELERATOR PUMP CAM BLUE FOR ANY HOLLEY 2BBL 2300 SERIES, OR ANY 4BBL HOLLEY 4160 4150 or 4150 hp Holley Carburettors Speed DemonMighty...
30/50cc Pump Cam - White
$14.50
HP12-14
Base Plates & Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Pumps, Cams, Nozzles - Holley Tuning Parts
HOLLEY ACCELERATOR PUMP CAM WHITE FOR ANY HOLLEY 2BBL 2300 SERIES, OR ANY 4BBL HOLLEY 4160 4150 or 4150 hp Holley Carburettors Speed DemonMighty...
Holley 26-71 Fuel Inlet Fitting Gasket (9/16" ID)
$35.95
HOL-26-71
Floats, Bowls, Fittings - Holley Tuning Parts
Fuel Rails & Fittings
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Inverted Flare Fitting Tube 5/16" Thread 9/16-24 (A) x 1/2-20 (B) Brand Holley Category Air and Fuel Delivery Color Gold Emission Code 5 End...
30/50cc Pump Cam - Orange
$14.50
HP12-46
Base Plates & Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Pumps, Cams, Nozzles - Holley Tuning Parts
HOLLEY ACCELERATOR PUMP CAM ORANGE FOR ANY HOLLEY 2BBL 2300 SERIES, OR ANY 4BBL HOLLEY 4160 4150 or 4150 hp Holley Carburettors Speed DemonMighty...
30/50cc Pump Cam - Red
$14.50
HP12-43
Base Plates & Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Pumps, Cams, Nozzles - Holley Tuning Parts
HOLLEY ACCELERATOR PUMP CAM RED FOR ANY HOLLEY 2BBL 2300 SERIES, OR ANY 4BBL HOLLEY 4160 4150 or 4150 hp Holley Carburettors Speed DemonMighty...
30/50cc Pump Cam - Black
$14.50
HP12-42
Base Plates & Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Pumps, Cams, Nozzles - Holley Tuning Parts
HOLLEY ACCELERATOR PUMP CAM BLACK FOR ANY HOLLEY 2BBL 2300 SERIES, OR ANY 4BBL HOLLEY 4160 4150 or 4150 hp Holley Carburettors Speed DemonMighty...
30/50cc Pump Cam - Green
$14.50
HP12-25
Base Plates & Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Pumps, Cams, Nozzles - Holley Tuning Parts
HOLLEY ACCELERATOR PUMP CAM GREEN FOR ANY HOLLEY 2BBL 2300 SERIES, OR ANY 4BBL HOLLEY 4160 4150 or 4150 hp Holley Carburettors Speed DemonMighty...
30/50cc Pump Cam - Brown Wide
$14.50
HP12-41
Base Plates & Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Pumps, Cams, Nozzles - Holley Tuning Parts
HOLLEY ACCELERATOR PUMP CAM BROWN WIDE FOR ANY HOLLEY 2BBL 2300 SERIES, OR ANY 4BBL HOLLEY 4160 4150 or 4150 hp Holley Carburettors Speed...
30/50cc Pump Cam - Brown Narrow
$14.50
HP12-45
Base Plates & Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Pumps, Cams, Nozzles - Holley Tuning Parts
HOLLEY ACCELERATOR PUMP CAM BROWN NARROW FOR ANY HOLLEY 2BBL 2300 SERIES, OR ANY 4BBL HOLLEY 4160 4150 or 4150 hp Holley Carburettors Stock...
Vacuum & Fuel Pump Tester
$45.00
GVFP100
Aussie Stromberg Single Barrel Carburettor Parts
Carburettor Tools
Carter Four Barrel 4BBL Carburettor Parts
Carter Four Barrel AFB Competition Carburettor Rebuild Parts
Carter Four Barrel Thermoquad Carburettor Parts
Fuel Pressure Regulators & Gauges
Fuel Pressure Regulators - Holley Tuning Parts
Fuel Pumps & Filters
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Four Barrel 4500 Dominator Carburettor Parts
Holley Twin Barrel 2300 Carburettor Parts
Holley Twin Barrel 94 AA-1 2100 2110 Carburettor Parts
Metering Blocks & Parts - Holley Tuning Parts
Rochester Quadrajet Carburettor Parts
Rochester Twin Barrel 2GC 2GV Carburettor Parts
Stromberg Two Barrel 2BBL Carburettor Parts
Weber Down Draft DGV DGEV ADM DGMS Carburettor Parts
Weber Down Draft IDA IDF Carburettor Parts
Weber Side Draft DCOE Carburettor Parts
Test Fuel Pump Pressure To make sure not over pressure which causes carburettors to flood Fuel pump pressure range Should Be Between 2-6PSI for...
Needle & Seat Repair Kit Inserts For Holley Fuel Bowls Qty 10
$80.00
HRI-3/10
Carburettor Tools
Floats, Bowls, Fittings - Holley Tuning Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4500 Dominator Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Holley Twin Barrel Misc Carburettor Parts
Needle & Seat Repair Insert For Holley Fuel Bowls Qty 10 Brass Insert Bulk Pack 10 x Brass threaded repair inserts Used for...
Needle & Seat Repair Kit Inserts For Holley Fuel Bowls Qty 5
$55.00
HRI-3B
Carburettor Tools
Floats, Bowls, Fittings - Holley Tuning Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4500 Dominator Carburettor Parts
Holley Tuning Parts & Kits
Holley Twin Barrel 2300 Carburettor Parts
Holley Twin Barrel Misc Carburettor Parts
Needle & Seat Repair Insert Kit For Holley Fuel Bowls Kit Includes 5 x Brass threaded repair inserts 5 x Needle and seat...
Holley Quickchange Vacuum Secondary Housing Cover 20-59
$55.00
HOL-20-59
Choke & Vacuum Secondary Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Tuning Parts & Kits
Faster spring changes - Gives easier access to the vacuum secondary spring. Quick-change design - Reduces the time needed to tune the vacuum secondary...
Holley 465 600 Fuel Filter Carburettor 26-141 Qty 2 For Side Hung Float Bowl
$25.00
HOL-26-141
Floats, Bowls, Fittings - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Twin Barrel 2300 Carburettor Parts
Replacement fuel bowl component helps keep your carburettor serviceable without chasing rare used parts. Correct float and bowl configuration supports stable fuel control under...
Holley 50CC Accelerator Pump Cover Housing & Screws - HO26-140
$45.50
HOL-26-140
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Four Barrel 4165 4175 Carburettor Parts
Holley Four Barrel 4500 Dominator Carburettor Parts
Holley Twin Barrel 2300 Carburettor Parts
Pumps, Cams, Nozzles - Holley Tuning Parts
Accelerator pump cover restores a proper seal and lever action on 50cc pump assemblies. Includes the lever and screws listed so you can replace...
Holley Choke Fast Idle Cam Red 4150 4160 Carby Carburettor Electric / Auto Choke
$25.00
HOL 45-376
Choke & Vacuum Secondary Parts - Holley Tuning Parts
Holley Carburettor Parts
Holley Four Barrel 4010 4011 Carburettor Parts
Holley Four Barrel 4150 4160 Carburettor Parts
Holley Twin Barrel 2300 Carburettor Parts
Holley Twin Barrel Misc Carburettor Parts
Fast idle cam helps restore correct cold-idle speed and step-down behaviour on Holley carburettors. Correct cam profile supports smoother warm-up and better throttle response...
