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Rochester 4G, 4GC, 4 Jet Jets 120-11
Rochester 4G, 4GC, 4 Jet Jets 120-11

Rochester 4G, 4GC, 4 Jet Jets 120-11

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Your Price: $5.25
Part Number: 120-11
Availability: In Stock

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Rochester 4 barrel main jets. Used on 4G & 4GC carburetors. Commonly known as the 4 Jet. There are two main primary jets and 2 main secondary jets in this carburetor. Price is for 1 jet. You will probably need 2.

To correctly determine what jet size you need in your carburetor test the current setup by driving at a sustained speed for 20 minutes, stop, pull a plug and check the color. Gray is perfect, white is too lean and black is too rich. Change your jets, then try the test again.

Thread size on this jet is 28

Min order: 2
MAKE
YEAR
MODEL
CARB NUMBER
PRIMARY JET
SECONDARY JET
BUICK
1955
EARLY 50, 60, 70
7006200
 
 
BUICK
1955
LATE 50, 60, 70
7009100
 
 
BUICK
1956
50, 60, 70
7009200
 
 
BUICK
1956
M-50, 60, 70
7009900
 
 
BUICK
1957
EARLY 50, 60, 70
7010070
 
 
BUICK
1957
LATE 50, 60, 70
7011570
 
 
BUICK
1958
EARLY 50, 60 70
7011600
 
 
BUICK
1958
LATE 50, 60, 70
7013100
 
 
BUICK
1959
4600, 4 700, 4800
7013044
.086
.0635
BUICK
1960
4600, 4 700, 4800
7015040
.0935
.089
BUICK
1961
ELECTRA, INVICTA, LE SABRE
7019040
 
 
BUICK
1961-62
SPECIAL A/T
7020043
 
 
BUICK
1961-62
SPECIAL A/T
7020043
 
 
BUICK
1961-62
SPECIAL S/T
7020045
 
 
BUICK
1961-62
SPECIAL S/T
7020045
 
 
BUICK
1961-63
215
7020043
 
 
BUICK
1961-63
215
7020043
 
 
BUICK
1961-63
215
7020045
 
 
BUICK
1961-63
215
7020045
 
 
BUICK
1962
ELECTRA, INVICTA, LE SABRE
7020040
 
 
BUICK
1962
ELECTRA, INVICTA, LE SABRE
7020041
 
 
BUICK
1963
EARLY 8 STD
7023040
 
 
BUICK
1963
EARLY 8 STD
7023040
 
 
BUICK
1963
8 SPL A/T
7023044
 
 
BUICK
1963
8 SPL S/T
7023045
 
 
BUICK
1963
LATE 8 STD
7023143
 
 
BUICK
1963
LATE 8 STD
7023143
 
 
BUICK
1963-65
EARLY 8 STD
7023040
 
 
BUICK
1963-65
EARLY 8 STD
7023040
 
 
BUICK
1963-65
LATE 8 STD
7023143
 
 
BUICK
1963-65
LATE 8 STD
7023143
 
 
BUICK
1964
8 WILDCAT & ELECTRA
7024040
 
 
BUICK
1964
8 SPL & LE SABRE A/T
7024044
 
 
BUICK
1964
8 SPL & LE SABRE S/T
7024045
 
 
BUICK
1965
EARLY 401?
7025040
 
 
BUICK
1965
425?
7025042
 
 
BUICK
1965
LATE 401?
7025140
 
 
BUICK
1966
340? A.I.R. A/T
7026040
 
 
CADILLAC
1952
 
7004500
.052
.063
CADILLAC
1953
H/M
7005100
.049
.060
CADILLAC
1953
D/F
7006215
 
 
CADILLAC
1953
D/F
7006215
.049
.060
CADILLAC
1954
EARLY
7006220
.048
.063
CADILLAC
1954
AIR EARLY
7006221
.048
.063
CADILLAC
1954
LATE
7006962
 
 
CADILLAC
1954
AIR LATE
7006963
 
 
CADILLAC
1954-55
 
7007242
 
 
CADILLAC
1955
ELDORADO FRONT
7007240
 
 
CADILLAC
1955
ELDORADO REAR
7007241
 
 
CADILLAC
1955
ELDORADO REAR
7007942
.049
.064
CADILLAC
1955
EARLY
7007970
.049
.073
CADILLAC
1955
AIR EARLY
7007971
.049
.073
CADILLAC
1955
LATE
7009070
.049
.073
CADILLAC
1955
AIR LATE
7009071
.049
.073
CADILLAC
1956
EARLY
7008750
.051
.068
CADILLAC
1956
AIR EARLY
7008751
.051
.068
CADILLAC
1956
LATE
7009750
.051
.068
CADILLAC
1956
AIR LATE
7009751
.051
.068
CADILLAC
1957
EARLY
7010100
.056
.084
CADILLAC
1957
AIR EARLY
7010101
 
 
CADILLAC
1957
AIR EARLY
7012001
.056
.084
CADILLAC
1957
AIR EARLY
7012001
 
 
CADILLAC
1957-1966
ALL
7012000
 
 
CADILLAC
1957-1966
ALL
7012000
 
 
CADILLAC
1957-66
ALL
7012000
 
 
CADILLAC
1957-66
ALL
7012000
 
 
CADILLAC
1957-66
ALL
7012001
 
 
CADILLAC
1957-66
ALL
7012001
.056
.084
CADILLAC
1957-66
ALL
7012010
 
 
CADILLAC
1957-66
ALL
7012010
.059
.082
CADILLAC
1957-66
ALL
7012010
.059
.082
CADILLAC
1957-66
ALL
7012011
 
 
CADILLAC
1957-66
ALL
7012011
.059
.082
CADILLAC
1958
EARLY
7012010
.059
.082
CADILLAC
1958
EARLY
7012010
 
 
CADILLAC
1958
EARLY
7012010
.059
.082
CADILLAC
1958
AIR EARLY
7012011
 
 
CADILLAC
1958
AIR EARLY
7012011
.059
.082
CADILLAC
1958
AIR LATE
7012811
.059
.082
CADILLAC
1958
LATE
7012910
.059
.082
CADILLAC
1959-60
 
7013030
.058
.084
CADILLAC
1959-60
 
7013031
.058
.084
CADILLAC
1961-62
 
7019030
.058
.078
CADILLAC
1961-62
 
7019031
.058
.078
CADILLAC
1963
D/F
7006215
.049
.060
CADILLAC
1963
D/F
7006215
 
 
CADILLAC
1963
 
7023030
.056
.075
CADILLAC
1963
 
7023031
.056
.075
CADILLAC
1964
 
7024030
.055
.085
CADILLAC
1964
 
7024031
.055
.085
CADILLAC
1965
 
7025030
.054
.083
CADILLAC
1965
W/AC
7025031
.054
.083
CADILLAC
1966
 
7026030
.056
.085
CADILLAC
1966
W/AC
7026031
.056
.085
CHECKER
 
327?
7025185
.059
.066
CHEVROLET
1956
8 A/T
7008737
.048
.046
CHEVROLET
1956-58
348
7011108
.058
.065
CHEVROLET
1956-58
348
7011108
.058
.065
CHEVROLET
1956-58
348
7011108
 
 
CHEVROLET
1956-58
348
7011108
 
 
CHEVROLET
1956-58
348
7011108
 
 
CHEVROLET
1956-58
348
7011108
 
 
CHEVROLET
1956-58
V8
7012126
.048
.051
CHEVROLET
1956-58
V8
7012126
 
 
CHEVROLET
1956-58
 
7012128
 
 
CHEVROLET
1956-58
V8
7012128
 
 
CHEVROLET
1956-58
V8
7012128
 
 
CHEVROLET
1956-58
 
7012128
 
 
CHEVROLET
1956-58
V8
7012128
 
 
CHEVROLET
1956-58
 
7012128
 
 
CHEVROLET
1957
EARLY 8
7009846
.048
.051
CHEVROLET
1957
LATE 8
7012126
.048
.051
CHEVROLET
1957
LATE 8
7012126
 
 
CHEVROLET
1958
348? 8 A/T
7011108
.058
.065
CHEVROLET
1958
348? 8 A/T
7011108
 
 
CHEVROLET
1958
348? 8 A/T
7011108
 
 
CHEVROLET
1958
283? A/T
7012128
 
 
CHEVROLET
1958
283? A/T
7012128
 
 
CHEVROLET
1958
283? A/T
7012128
 
 
CHEVROLET
1959-60
EARLY 283?
7013004
 
 
CHEVROLET
1959-60
348?
7013006
 
 
CHEVROLET
1959-60
283?
7013010
.047
.053
CHEVROLET
1959-60
348?
7013012
.056
.067
CHEVROLET
1960
LATE 348?
7015006
 
 
CHEVROLET

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