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

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

7 Review(s)

Your Price: $5.25

Part Number: 120-11

Availability: In Stock

4G Jet Sizes *

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Description
Customer Reviews

Rochester 4 barrel main jets. Used on 4G & 4GC, 4 barrel 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

7012126

.048

.051

CHEVROLET

1956-58

7012126

CHEVROLET

1956-58

7012128

CHEVROLET

1956-58

7012128

CHEVROLET

1956-58

7012128

CHEVROLET

1956-58

7012128

CHEVROLET

1956-58

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

Rating Snapshot

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Average Customer Ratings

4.9

Owner

Thanks for the fast service. Received 2 jets label as #52 one was a # 52 one was #51 did not have time to send back drill to size.

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: Gary johnson from Selma n.c. on 4/6/2020

Rochester 4jet main jets

Very happy with correct parts,fast shipping ??

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Reviewed by: DONALD BRINKMAN from HANCOCK on 8/7/2022

owner

These 10 % large than stock jets fixed a lean running surge problem we had on a 1963 Olds Starfire

Did you find this helpful?

Reviewed by: Gerry from Fowler on 9/26/2018

Rochester Jets

Prompt shipping and the right part. Everything you would want. Will buy here again.

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Reviewed by: Phil from Omaha, NE on 12/25/2017

owner classic auto storage

great service, quick shipping and carb works GREAT!

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Reviewed by: RICHARD RABANUS from MINNEAPOLIS on 11/9/2017

Owner

It is a gift to be able to purchase jets for antique carburetors so easily, and at such a low price. The jets I have a large variation in orifice sizes from that stamped on the top. Be sure to use a good small hole gauge before installing. Buy more than needed to get the quantity of correct size in one order.

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Reviewed by: Hornblower Services from Los Lunas, New Mexico on 1/17/2017

Owner

We appreciate the large spread of Jet Sizes available, and at a good price. We can re-jet client's cars for proper fuel/air efficiency without the scramble for hard to find parts.

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Reviewed by: Hornblower Services from Los Lunas, New Mexico on 12/31/2016

Carburetor Parts > by Part Type > Carburetor Jets & Metering Rods

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

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Rochester 4 barrel main jets. Used on 4G & 4GC, 4 barrel carburetors.

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