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Holley

Discharge Nozzles, Holley, Carburetor Accelerator Pump

Part# : CH20191
Mfg#: 121-128
Sold As: Each
Ship Size: Standard
$25.99
List Price: $29.95
You Save 13%
Vehicle Specific View fitment for 62 models
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Carburetor Accelerator Pump Discharge Nozzle by Holley®

Choose the nozzle opening to tune accelerator-pump discharge rate as the throttle opens.

This Holley® accelerator pump discharge nozzle meters the rate of the fuel shot delivered when the throttle opens. A larger opening discharges the fuel more quickly and at lower pressure; it does not by itself establish the total pump-shot volume. Choose from .028", .031", .032", .035", .037", .040", .042" or .045" openings to suit the carburetor calibration. Each package contains one discharge nozzle and two gaskets.

• Eight nozzle sizes from .028" to .045" • Opening size controls fuel discharge rate • Larger openings provide faster discharge • One selected nozzle per package • Two sealing gaskets are included

Notes

  • This item is not eligible for any further discounts or promotional pricing.
4
This product does not require an EO in California. By nature of its design, it is legal for sale and use in all 50 states. Replacement parts included. Learn More
We aim to provide accurate and complete product information. If you notice anything incorrect, missing, or unclear, please let us know.
WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Vehicle Fitment

Year Make Model Application Details
1982 Buick Grand National .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1984–1987 Buick Grand National .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1976–1987 Buick Regal .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1978–1987: .028 hole size
1978–1987: .031 hole size
1978–1987: .032 hole size
1978–1987: .035 hole size
1978–1987: .037 hole size
1978–1987: .040 hole size
1978–1987: .042 hole size
1978–1987: .045 hole size
1963–1976 Buick Riviera .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1961–1972 Buick Skylark .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1983–1986 Buick T-Type .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1938–1993 Cadillac 60 Special .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
2013–2019 Cadillac ATS .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1965–1976 Cadillac Calais .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
2003–2019 Cadillac CTS .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1959–2005 Cadillac DeVille .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1953–2002 Cadillac Eldorado .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1999–2000 Cadillac Escalade .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
2002–2023 Cadillac Escalade .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
2002–2013 Cadillac Escalade EXT .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1965–1996 Cadillac Fleetwood .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1936–1951 Cadillac Series 60 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1946–1964 Cadillac Series 60 Fleetwood  
1936–1951 Cadillac Series 61 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1937–1976 Cadillac Series 62 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1936–1951 Cadillac Series 63 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1937–1938 Cadillac Series 65 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1936–1942 Cadillac Series 67 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1936–1937 Cadillac Series 70 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1940 Cadillac Series 72 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1936–1942 Cadillac Series 75 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1946–1964 Cadillac Series 75 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1946–1964 Cadillac Series 75 Fleetwood  
1976–2004 Cadillac Seville .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
2005–2011 Cadillac STS .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
2004–2009 Cadillac XLR .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1947–1955 Chevrolet Advance Design  
1969–1994 Chevrolet Blazer .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1960–1987 Chevrolet C10 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1960–1987 Chevrolet C20 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1960–1987 Chevrolet C30 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1964–1977 Chevrolet Chevelle .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1960–1969 Chevrolet Corvair .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1961–1965 Chevrolet Corvair 95 FC .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1959–1960 Chevrolet El Camino .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1964–1987 Chevrolet El Camino .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1978–1987: .028 hole size
1978–1987: .031 hole size
1978–1987: .032 hole size
1978–1987: .035 hole size
1978–1987: .037 hole size
1978–1987: .040 hole size
1978–1987: .042 hole size
1978–1987: .045 hole size
1960–1987 Chevrolet K10 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1960–1987 Chevrolet K20 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1977–1987 Chevrolet K30 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1978–1983 Chevrolet Malibu .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1997–2022 Chevrolet Malibu  
1970–1988 Chevrolet Monte Carlo 1970–1972: .028 Hole Size
1970–1972: .031 Hole Size
1970–1972: .032 Hole Size
1970–1972: .035 Hole Size
1970–1972: .037 Hole Size
1970–1972: .040 Hole Size
1970–1972: .042 Hole Size
1970–1972: .045 Hole Size
.028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1978–1988: .028 hole size
1978–1988: .031 hole size
1978–1988: .032 hole size
1978–1988: .035 hole size
1978–1988: .037 hole size
1978–1988: .040 hole size
1978–1988: .042 hole size
1978–1988: .045 hole size
1995–2007 Chevrolet Monte Carlo .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1960–1991 Chevrolet Suburban .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1955–1959 Chevrolet Task Force .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1955–1959 GMC Blue Chip .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1960–1987 GMC C15/C1500 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1960–1987 GMC C25/C2500 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1960–1987 GMC C35/C3500 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1978–1987 GMC Caballero .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1970–1991 GMC Jimmy .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1960–1987 GMC K15/K1500 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1960–1987 GMC K25/K2500 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1977–1987 GMC K35/K3500 .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1947–1955 GMC New Design .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1971–1977 GMC Sprint .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1960–1991 GMC Suburban  
1961–1988 Oldsmobile Cutlass .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1964–1972: .028 hole size
1964–1972: .031 hole size
1964–1972: .032 hole size
1964–1972: .035 hole size
1964–1972: .037 hole size
1964–1972: .040 hole size
1964–1972: .042 hole size
1964–1972: .045 hole size
1978–1987: .028 hole size
1978–1987: .031 hole size
1978–1987: .032 hole size
1978–1987: .035 hole size
1978–1987: .037 hole size
1978–1987: .040 hole size
1978–1987: .042 hole size
1978–1987: .045 hole size
1958–1986 Pontiac Bonneville .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1964–1973: .028 hole size
1964–1973: .031 hole size
1964–1973: .032 hole size
1964–1973: .035 hole size
1964–1973: .037 hole size
1964–1973: .040 hole size
1964–1973: .042 hole size
1964–1973: .045 hole size
1982–1986: .028 hole size
1982–1986: .031 hole size
1982–1986: .032 hole size
1982–1986: .035 hole size
1982–1986: .037 hole size
1982–1986: .040 hole size
1982–1986: .042 hole size
1982–1986: .045 hole size
1959–1977 Pontiac Catalina .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1964–1973: .028 hole size
1964–1973: .031 hole size
1964–1973: .032 hole size
1964–1973: .035 hole size
1964–1973: .037 hole size
1964–1973: .040 hole size
1964–1973: .042 hole size
1964–1973: .045 hole size
1962–1987 Pontiac Grand Prix .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1964–1973: .028 hole size
1964–1973: .031 hole size
1964–1973: .032 hole size
1964–1973: .035 hole size
1964–1973: .037 hole size
1964–1973: .040 hole size
1964–1973: .042 hole size
1964–1973: .045 hole size
1978–1987: .028 hole size
1978–1987: .031 hole size
1978–1987: .032 hole size
1978–1987: .035 hole size
1978–1987: .037 hole size
1978–1987: .040 hole size
1978–1987: .042 hole size
1978–1987: .045 hole size
1964–1973 Pontiac GTO .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1961–1981 Pontiac LeMans .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1964–1973: .028 hole size
1964–1973: .031 hole size
1964–1973: .032 hole size
1964–1973: .035 hole size
1964–1973: .037 hole size
1964–1973: .040 hole size
1964–1973: .042 hole size
1964–1973: .045 hole size
1961–1970 Pontiac Tempest .028 hole size
.031 hole size
.032 hole size
.035 hole size
.037 hole size
.040 hole size
.042 hole size
.045 hole size
1964–1970: .028 hole size
1964–1970: .031 hole size
1964–1970: .032 hole size
1964–1970: .035 hole size
1964–1970: .037 hole size
1964–1970: .040 hole size
1964–1970: .042 hole size
1964–1970: .045 hole size
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