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MSD Ignition 8421

MSD Ignition Cap-A-Dapt Rotor Adjustable

121-8421

made in usa
Ships

$37.26
$33.53
SAVE $3.73
MSD Ignition Cap-A-Dapt Rotor Adjustable $33.53
Out of stock
QTY
Cap-A-Dapt Rotor
  • Adjustable
  • Chevy V8
  • MSD Ignition 8421 Details

    Cap-A-Dapt Components

    This two-piece rotor allows you to adjust the rotor tip to cap terminal alignment so you can adjust rotor phasing. If you are running a Multi-Step Retard or Timing Controller, the ability to adjust the rotor is beneficial.

    Application:

  • MSD Cap-A-Dapt 121-8420
  • Upgrade to MSD Cap-A-Dapts 121-8445 and 121-8441

  • Specifications:

    Contact Terminal Material
    Stainless steel
    Quantity
    Sold individually
    Manufacturer's Part Number:
    8421
    Shipping Weight:
    0.38
    Package Height:
    0.2
    Package Depth:
    0.3
    Package Width:
    0.2

    MSD distributor caps and rotors are designed with performance in mind and molded from high-quality, voltage-insulating material with terminals that resist carbon tracking. Whenever the distributor cap is changed, you should install a new rotor. Likewise, if you're replacing the rotor, be sure to install a new cap as well. MSD has new kits featuring Rynite injection molded distributor caps and retainers to complete your distributor tune-up. MSD also has Cap-A-Dapts to fit large Ford-style caps onto MSD distributors.

    Does MSD Ignition 8421 fit your vehicle?

    Narrow Results

    1980-1982 FORD F-150

    • Liter: 5.0
    • Aspiration: N
    • SubModel: CUSTOM
    • Engine Vin: F
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1987-1992 FORD F-150

    • Liter: 5.8
    • SubModel: CUSTOM
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1983-1986 FORD F-350

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1978 FORD F-150

    • Liter: 5.8
    • SubModel: NORTHLAND
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1995 FORD F-350

    • Liter: 5.8
    • SubModel: EDDIE BAUER
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1985-1992 FORD F-350

    • Liter: 5.8
    • SubModel: XLT LARIAT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1988-1991 FORD E-150 ECONOLINE CLUB WAGON

    • Liter: 5.8
    • SubModel: XL
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1978 FORD F-150

    • Liter: 7.5
    • SubModel: NORTHLAND
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1977-1981 FORD F-250

    • Liter: 5.8
    • SubModel: RANGER XLT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1995 FORD F-350

    • Liter: 7.5
    • SubModel: EDDIE BAUER
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1988 FORD F53

    • EngineType: ALL
    • SubModel: CUSTOM

    1984 FORD E-150 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: XLT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1978 FORD E-100 ECONOLINE CLUB WAGON

    • Liter: 5.8
    • SubModel: NORTHLAND
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977 FORD F-150

    • Liter: 6.6
    • SubModel: XLT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1975-1976 FORD LTD

    • EngineType: ALL
    • SubModel: BROUGHAM

    1975-1978 FORD F-350

    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1978-1981 FORD F-150

    • Liter: 5.0
    • SubModel: RANGER LARIAT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1977-1978 FORD F-150

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1995-1996 FORD F-250

    • Liter: 5.0
    • Aspiration: N
    • SubModel: XL
    • Engine Vin: N
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1980 FORD LTD

    • CC: 5753
    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1976-1977 FORD RANCHERO

    • Liter: 7.5
    • SubModel: GT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1992 FORD BRONCO

    • Liter: 5.0
    • SubModel: XLT NITE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1977-1978 FORD E-250 ECONOLINE CLUB WAGON

    • Liter: 7.5
    • SubModel: NORTHLAND
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1975-1979 FORD F-150

    • Liter: 7.5
    • SubModel: CUSTOM
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1975-1978 FORD F-350

    • Liter: 5.0
    • SubModel: NORTHLAND
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1980-1982 FORD FAIRMONT

    • Liter: 4.2
    • SubModel: BASE
    • CUI: 255
    • EngineType: V8 ( 4.2 L / 255 )

    1995 FORD MUSTANG

    • EngineType: ALL
    • SubModel: GTS

    1988-1996 FORD E-150 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: XLT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1979 FORD F-250

    • Liter: 7.5
    • SubModel: RANGER XLT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1975-1980 FORD E-250 ECONOLINE

    • Liter: 7.5
    • SubModel: CUSTOM
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1982 FORD MUSTANG

    • Liter: 5.0
    • SubModel: GL
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1983 FORD E-100 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: XL
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1985-1992 FORD F-150

    • Liter: 5.8
    • SubModel: XLT LARIAT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1978-1981 FORD F-150

    • Liter: 5.8
    • SubModel: RANGER LARIAT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1995-1996 FORD BRONCO

    • EngineType: ALL
    • SubModel: XLT SPORT

    1975-1980 FORD LTD

    • EngineType: ALL
    • SubModel: COUNTRY SQUIRE

    1980 FORD F-350

    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1978-1979 FORD F-150

    • Liter: 6.6
    • SubModel: RANGER LARIAT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1982 FORD F-150

    • Liter: 5.8
    • SubModel: CUSTOM
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1993 FORD MUSTANG

    • EngineType: ALL
    • SubModel: SVT COBRA R

    1977 MERCURY COUGAR

    • EngineType: ALL
    • SubModel: BROUGHAM

    1982 FORD F-250

    • Liter: 6.6
    • SubModel: XL
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979-1982 FORD E-100 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1994-1996 FORD F-250

    • Liter: 5.8
    • SubModel: XLT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1978 FORD LTD

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1980-1982 MERCURY ZEPHYR

    • Liter: 4.2
    • SubModel: BASE
    • CUI: 255
    • EngineType: V8 ( 4.2 L / 255 )

    1980-1981 FORD THUNDERBIRD

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1983 FORD F-350

    • Liter: 7.5
    • SubModel: XLS
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1976-1978 FORD RANCHERO

    • EngineType: ALL
    • SubModel: SQUIRE

    1975-1978 FORD E-250 ECONOLINE

    • Liter: 7.5
    • SubModel: NORTHLAND
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1975-1982 FORD E-100 ECONOLINE

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1983-1991 FORD E-250 ECONOLINE CLUB WAGON

    • Liter: 5.8
    • SubModel: XL
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1995-1996 FORD F-150

    • Liter: 5.0
    • SubModel: EDDIE BAUER
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1977-1978 FORD F-350

    • Liter: 5.8
    • SubModel: NORTHLAND
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1987 FORD E-150 ECONOLINE

    • Liter: 5.0
    • SubModel: XLT
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1980 FORD GRANADA

    • Liter: 4.2
    • SubModel: BASE
    • CUI: 255
    • EngineType: V8 ( 4.2 L / 255 )

    1982 FORD MUSTANG

    • Liter: 4.2
    • SubModel: L
    • CUI: 255
    • EngineType: V8 ( 4.2 L / 255 )

    1979-1982 FORD E-250 ECONOLINE

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1995-1996 FORD F-250

    • Liter: 5.0
    • SubModel: SPECIAL
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1977-1978 FORD F-100

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1978 FORD E-250 ECONOLINE

    • Liter: 5.8
    • SubModel: NORTHLAND
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1979 FORD F-100

    • Liter: 5.8
    • SubModel: CUSTOM
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1982 FORD MUSTANG

    • Liter: 4.2
    • SubModel: GLX
    • CUI: 255
    • EngineType: V8 ( 4.2 L / 255 )

    1983 FORD E-100 ECONOLINE CLUB WAGON

    • Liter: 5.8
    • SubModel: XL
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1995-1996 FORD F-150

    • Liter: 5.0
    • SubModel: SPECIAL
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1983 FORD E-350 ECONOLINE

    • Liter: 5.8
    • SubModel: CUSTOM
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1983-1986 FORD F-250

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975 FORD E-250 ECONOLINE

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1983-1986 MERCURY COUGAR

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1978-1979 FORD F-150

    • Liter: 7.5
    • SubModel: RANGER LARIAT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1984-1986 FORD THUNDERBIRD

    • Liter: 5.0
    • SubModel: ELAN
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1979 FORD F-350

    • Liter: 7.5
    • SubModel: CUSTOM
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1987-1991 FORD COUNTRY SQUIRE

    • EngineType: ALL
    • SubModel: ALL

    1986 FORD LTD

    • EngineType: ALL
    • SubModel: CROWN VICTORIA LX

    1977-1982 FORD F-350

    • Liter: 5.8
    • SubModel: CUSTOM
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1982 FORD F-350

    • Liter: 6.6
    • SubModel: XLS
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1995-1996 FORD F-150

    • Liter: 5.8
    • SubModel: SPECIAL
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1977-1978 FORD F-250

    • Liter: 6.6
    • SubModel: NORTHLAND
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1979 FORD F-150

    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1978 FORD E-100 ECONOLINE

    • Liter: 7.5
    • SubModel: BASE
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1983-1991 MERCURY GRAND MARQUIS

    • EngineType: ALL
    • SubModel: LS

    1976-1978 FORD RANCHERO

    • EngineType: ALL
    • SubModel: 500

    1984-1989 FORD E-350 ECONOLINE CLUB WAGON

    • Liter: 7.5
    • SubModel: XLT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1980-1982 MERCURY CAPRI

    • Liter: 4.2
    • SubModel: BASE
    • CUI: 255
    • EngineType: V8 ( 4.2 L / 255 )

    1983-1986 FORD F-250

    • Liter: 7.5
    • SubModel: BASE
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1993 FORD BRONCO

    • EngineType: ALL
    • SubModel: XLT LARIAT

    1991-1992 MERCURY COUGAR

    • Liter: 5.0
    • SubModel: LS
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1983 FORD F-250

    • Liter: 7.5
    • SubModel: XLS
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1979-1982 FORD E-100 ECONOLINE CLUB WAGON

    • Liter: 5.0
    • SubModel: CHATEAU
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1977 FORD F-250

    • Liter: 6.6
    • SubModel: XLT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1987-1992 FORD F-350

    • Liter: 7.5
    • SubModel: CUSTOM
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    1975-1982 FORD F-100

    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1975-1979 FORD F-150

    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1993 FORD F-250

    • CC: 5753
    • Liter: 5.8
    • SubModel: XLT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1978-1979 FORD F-100

    • Liter: 6.6
    • SubModel: RANGER LARIAT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977-1979 FORD LTD II

    • EngineType: ALL
    • SubModel: ALL

    1975-1982 FORD E-150 ECONOLINE

    • Liter: 5.8
    • SubModel: CHATEAU
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1975-1977 FORD BRONCO

    • EngineType: ALL
    • SubModel: ALL

    1983 FORD THUNDERBIRD

    • Liter: 5.0
    • SubModel: HERITAGE
    • CUI: 302
    • EngineType: V8 ( 5.0 L / 302 )

    1983-1984 FORD F-350

    • Liter: 7.5
    • SubModel: XLT
    • CUI: 460
    • EngineType: V8 ( 7.5 L / 460 )

    IS THIS THE LOCK OUT MECHCANIAL TIMMING?

    Asked by: tazchevy3
    No; it is a Cap-A-Dapt Rotor only
    Answered by: SteveM
    Date published: 2018-03-08

    Hello , will this part fit: ‘JEGS Performance Products 40066 SSR-II Pro Series Distributor for Ford 351C-460’   thanks  Stephen

    Asked by: Stephen456789
    This kit should fit the Jegs brand distributor as it uses a stock GM style rotor.
    Answered by: Rusty B
    Date published: 2017-10-16
    • y_2018, m_12, d_11, h_1CST
    • bvseo_bulk, prod_bvqa, vn_bulk_2.0.9
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_2
    • loc_en_US, sid_10001_10001_31518, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs

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    Tools:

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    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.