1987 Chevy R20 Alternators

331 products fit your

1987 Chevy R20

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1987 Chevy R20

Products

-20%

Powermaster |

#255678021

Powermaster 678021 Street Alternator, 140 Amps, V-belt, 12V

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Polished

$243.99

/each

$307.50

-21%

Powermaster |

#255378021362

Powermaster 378021-362 Street Alternator, 140 Amps, V-belt, 12V

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Chrome

$264.99

/each

$337.50

-22%

Tuff Stuff |

#7457139BU6G12

Tuff Stuff 7139BBUL6G12 GM Silver Bullet 100 Amp Alternator, Pol

One Wire Alternator:

Yes

Alternator Amperage:

100 amp

Alternator Finish:

Polished

$197.99

/each

$255.79

-23%

Powermaster |

#255378028362

Powermaster 378028-362 XS Volt Alternator, 140 Amps, V-belt

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Chrome

$280.99

/each

$367.50

-22%

Tuff Stuff |

#7457140AU6G12

Tuff Stuff 7140ABUL6G12 GM Silver Bullet 140 Amp Alternator, Chr

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Chrome

$265.99

/each

$343.92

Alternator Bracket Install on a 454 Big Block Chevy

Kevin W. walks through each step of installing a new alternator bracket on a 454 Big Block Chevy.

GM Alternator Identification

Learn about GM alternator identification in our guide. We cover GM 3 wire alternators, 1 wire alternators, and externally regulated so you know what to choose.

Ford Alternator Buying Guide

Brief review of the different types of Ford alternators and regulators available through Speedway Motors.

LS Swap Chevelle Guide

Learn about performing an LS Swap in a 1972 Chevelle in this tech article. We'll discuss lessons learned from our Chevelle engine swap using a 500-horse 6.0.

Transmission Replacement on a 55 Chevy

Learn how Zach replaces a transmission and breakaway converter in his 55 Chevy, with some helpful tips along the way.

How To Set Up Multiple Carburetors on a Vintage Engine

There's a right and wrong way to run a two-barrel carburetor on your vintage engine. Check out this guide about how to select the correct carburetor for your Flathead or vintage engine.

-22%

Tuff Stuff |

#7457139AU6G12

Tuff Stuff 7139ABUL6G12 GM Silver Bullet 100 Amp Alternator, Chr

One Wire Alternator:

Yes

Alternator Amperage:

100 amp

Alternator Finish:

Chrome

$216.99

/each

$278.84

-21%

Powermaster |

#255374021

Powermaster 374021 Street Alternator, 140 Amps, V-belt, 12V, GM

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Chrome

$264.99

/each

$337.50

-20%

Powermaster |

#25547402

Powermaster 47402 Street Alternator, 140A, Serpentine, 12V, GM

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Natural

$221.99

/each

$277.50

-21%

Powermaster |

#255674021

Powermaster 674021 Street Alternator, 140 Amps, V-belt, 12V, GM

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Polished

$264.99

/each

$337.50

-20%

Powermaster |

#25557402

Powermaster 57402 Street Alternator, 140A, Serpentine, 12V, GM

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Powder Coated

$243.99

/each

$307.50

-20%

Powermaster |

#255474021

Powermaster 474021 Street Alternator, 140 Amps, V-belt, 12V, GM

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Natural

$221.99

/each

$277.50

-21%

Powermaster |

#25567402

Powermaster 67402 Street Alternator, 140A, Serpentine, 12V, GM

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Polished

$264.99

/each

$337.50

-23%

Powermaster |

#2558012

Powermaster 8012 Race Alternator, 105 Amps, Serpentine, 12V, GM

One Wire Alternator:

Yes

Alternator Amperage:

105 amp

Alternator Finish:

Natural

$204.99

/each

$268.75

-24%

Powermaster |

#2558018

Powermaster 8018 XS Volt Alternator, 105 Amps, Serpentine, GM

One Wire Alternator:

Yes

Alternator Amperage:

105 amp

Alternator Finish:

Natural

$224.99

/each

$297.50

-24%

Powermaster |

#255574021

Powermaster 574021 Street Alternator, 140 Amps, V-belt, 12V, GM

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Powder Coated

$230.99

/each

$307.50

-12%

Tuff Stuff |

#7457127NKP6G12

Tuff Stuff 7127NKP6G12 GM Alternator, 140 Amp, 1-Wire, Polished

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Polished

$215.99

/each

$246.80

-22%

Tuff Stuff |

#7457127NKB6G12

Tuff Stuff 7127NKB6G12 GM Alternator, 140 Amp, 1-Wire, Black

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Powder Coated

$190.99

/each

$246.80

-31%

Tuff Stuff |

#7457127NF6G12

Tuff Stuff 7127NF6G12 GM Alternator, 100 Amp, 1-Wire, Stealth Blk

One Wire Alternator:

Yes

Alternator Amperage:

100 amp

Alternator Finish:

Powder Coated

$169.99

/each

$246.80

-34%

Tuff Stuff |

#7457127ND6G12

Tuff Stuff 7127ND6G12 GM Alternator, 100 Amp, 1-Wire, Chrome

One Wire Alternator:

Yes

Alternator Amperage:

100 amp

Alternator Finish:

Chrome

$151.99

/each

$233.62

-31%

Tuff Stuff |

#7457127K6G12

Tuff Stuff 7127K6G12 GM Alternator, 140 Amp, 1-Wire, Factory Cast

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Natural

$158.99

/each

$230.78

-31%

Tuff Stuff |

#7457127NK6G12

Tuff Stuff 7127NK6G12 GM Alternator, 140 Amp, 1-Wire, Chrome

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Chrome

$180.99

/each

$262.83

-18%

Powermaster |

#255278021

Powermaster 278021 Street Alternator, 105 Amps, V-belt, 12V

One Wire Alternator:

Yes

Alternator Amperage:

105 amp

Alternator Finish:

Polished

$226.99

/each

$277.50

-24%

Powermaster |

#255378021

Powermaster 378021 Street Alternator, 140 Amps, V-belt, 12V

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Chrome

$230.99

/each

$307.50

-23%

Powermaster |

#255178021

Powermaster 178021 Street Alternator, 105 Amps, V-belt, 12V

One Wire Alternator:

Yes

Alternator Amperage:

105 amp

Alternator Finish:

Chrome

$210.99

/each

$277.50

$126 Off

Powermaster |

#25582091

Powermaster 82091 PowerGEN Alternator, 90 Amps, V-belt, 12V

One Wire Alternator:

Yes

Alternator Amperage:

90 amp

Alternator Finish:

Powder Coated

$373.99

/each

$500.00

-19%

Powermaster |

#2558173

Powermaster 8173 Denso Style Race Alternator, 75A, 100mm, Natural

(1)

One Wire Alternator:

Yes

Alternator Amperage:

75 amp

Alternator Finish:

Natural

$237.99

/each

$296.25

-18%

Powermaster |

#2558166

Powermaster 8166 Race Alternator, 55 Amps, V-belt, 16V

One Wire Alternator:

Yes

Alternator Amperage:

55 amp

Alternator Finish:

Powder Coated

$289.99

/each

$356.25

$132 Off

Powermaster |

#2558128

Powermaster 8128 Race Alternator, 115 Amps, 12V

One Wire Alternator:

Yes

Alternator Amperage:

115 amp

Alternator Finish:

Powder Coated

$382.99

/each

$515.00

-18%

Powermaster |

#2558192

Powermaster 8192 Race Alternator, 75 Amps, V-belt, 12V

One Wire Alternator:

Yes

Alternator Amperage:

75 amp

Alternator Finish:

Natural

$244.99

/each

$300.00

-22%

Powermaster |

#2558111

Powermaster 8111 Race Alternator, 100 Amps, 12V

One Wire Alternator:

Yes

Alternator Amperage:

100 amp

Alternator Finish:

Natural

$302.99

/each

$388.75

-25%

Powermaster |

#2558066

Powermaster 8066 Race Alternator, 100 Amps, 16V

One Wire Alternator:

Yes

Alternator Amperage:

100 amp

Alternator Finish:

Powder Coated

$250.99

/each

$336.25

$132 Off

Powermaster |

#2558122

Powermaster 8122 Race Alternator, 115 Amps, 12V

One Wire Alternator:

Yes

Alternator Amperage:

115 amp

Alternator Finish:

Powder Coated

$355.99

/each

$487.50

$111 Off

Powermaster |

#2558158

Powermaster 8158 XS Volt Alternator, 160 Amps, Internal

One Wire Alternator:

Yes

Alternator Amperage:

160 amp

Alternator Finish:

Powder Coated

$472.99

/each

$583.75

-7%

Holley |

#425197303

Holley 197-303 Premium Alternator, 150A, Black

One Wire Alternator:

Yes

Alternator Amperage:

150 amp

Alternator Finish:

Powder Coated

$549.95

/each

$592.95

-21%

Powermaster |

#255678608

Powermaster 678608 GM CS130 XS Alternator, 140A, Polished, Right

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Polished

$264.99

/each

$337.50

-20%

Powermaster |

#25528476

Powermaster 28476 Race Alternator, 100 Amp, 16V 1 Wire Regulator

One Wire Alternator:

Yes

Alternator Amperage:

100 amp

Alternator Finish:

Polished

$347.99

/each

$435.00

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1987 Chevy R20 Alternators

One Wire Alternator

Brand

Availability

Discounts

Engine Family

Price

Customer Rating

Products

Powermaster 678021 Street Alternator, 140 Amps, V-belt, 12V

Powermaster 378021-362 Street Alternator, 140 Amps, V-belt, 12V

Tuff Stuff 7139BBUL6G12 GM Silver Bullet 100 Amp Alternator, Pol

Powermaster 378028-362 XS Volt Alternator, 140 Amps, V-belt

Tuff Stuff 7140ABUL6G12 GM Silver Bullet 140 Amp Alternator, Chr

Related Articles

Tuff Stuff 7139ABUL6G12 GM Silver Bullet 100 Amp Alternator, Chr

Powermaster 374021 Street Alternator, 140 Amps, V-belt, 12V, GM

Powermaster 47402 Street Alternator, 140A, Serpentine, 12V, GM

Powermaster 674021 Street Alternator, 140 Amps, V-belt, 12V, GM

Powermaster 57402 Street Alternator, 140A, Serpentine, 12V, GM

Powermaster 474021 Street Alternator, 140 Amps, V-belt, 12V, GM

Powermaster 67402 Street Alternator, 140A, Serpentine, 12V, GM

Powermaster 8012 Race Alternator, 105 Amps, Serpentine, 12V, GM

Powermaster 8018 XS Volt Alternator, 105 Amps, Serpentine, GM

Powermaster 574021 Street Alternator, 140 Amps, V-belt, 12V, GM

Tuff Stuff 7127NKP6G12 GM Alternator, 140 Amp, 1-Wire, Polished

Tuff Stuff 7127NKB6G12 GM Alternator, 140 Amp, 1-Wire, Black

Tuff Stuff 7127NF6G12 GM Alternator, 100 Amp, 1-Wire, Stealth Blk

Tuff Stuff 7127ND6G12 GM Alternator, 100 Amp, 1-Wire, Chrome

Tuff Stuff 7127K6G12 GM Alternator, 140 Amp, 1-Wire, Factory Cast

Tuff Stuff 7127NK6G12 GM Alternator, 140 Amp, 1-Wire, Chrome

Powermaster 278021 Street Alternator, 105 Amps, V-belt, 12V

Powermaster 378021 Street Alternator, 140 Amps, V-belt, 12V

Powermaster 178021 Street Alternator, 105 Amps, V-belt, 12V

Powermaster 82091 PowerGEN Alternator, 90 Amps, V-belt, 12V

Powermaster 8173 Denso Style Race Alternator, 75A, 100mm, Natural

Powermaster 8166 Race Alternator, 55 Amps, V-belt, 16V

Powermaster 8128 Race Alternator, 115 Amps, 12V

Powermaster 8192 Race Alternator, 75 Amps, V-belt, 12V

Powermaster 8111 Race Alternator, 100 Amps, 12V

Powermaster 8066 Race Alternator, 100 Amps, 16V

Powermaster 8122 Race Alternator, 115 Amps, 12V

Powermaster 8158 XS Volt Alternator, 160 Amps, Internal

Holley 197-303 Premium Alternator, 150A, Black

Powermaster 678608 GM CS130 XS Alternator, 140A, Polished, Right

Powermaster 28476 Race Alternator, 100 Amp, 16V 1 Wire Regulator

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