1987 Chevrolet R20 Alternator Parts

Choose your Submodel for your 1987 Chevrolet R20


Showing 1 - 10 of 20 products
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Proform
  • CS130 Alternator; 160 AMP; GM CS130; 1-Wire; Machined Pulley; Chrome; 100% New
  • 160 AMP; CS130; 1-Wire; Machined Pulley; Chrome; 100% New
  • Alternator; 160 AMP Model; GM CS-130 Style; 1-Wire With Internal Regulator; Machined Pulley; Chrome Finish; 100% New; Products; Sold Individually
  • Product Attributes:
    • Thread Size: M8-1.25
    • Voltage: 12 Volt
    • Category: Alternators
    • Pulley Diameter: 2 1/2 Inch
    • Feature/Benefit: A Manufacturing Break-through Has Enabled Proform To Offer 100% New Alternators With The Same Affordability As Other Brands' Re-built Models!
    • Part Type: Alternator
    • Wire Type: 1-wire
    • Case Style: Cs-130
    • Regulator Type: Internal
    • Amperage Output: 160 Amp
  • PROFORM's NEW CS130 160 AMP Alternator, for Small Block Chevy 305-350 and Big Block Chevy 402-454 engines, is a 1-wire, CS130 Case Style, complete with Internal Regulator. The External Fan Style Alternator features a Machined Pulley, Chrome finish and is NOT made with re-man components. Each alternator is produced by highly specialized machines, assembled by highly trained personnel using dedicated jigs and equipment - 100% New. Sold individually.

Additional Fitment Information:
Vehicle Block CC Engine Sub Model CID
1987 - Chevrolet R20 L - 6 Cyl 4.8L Silverado 292

Proform
  • CS130 Alternator; 160 AMP; GM CS130; 1-Wire; Machined Pulley; Satin; 100% New
  • 160 AMP; CS130; 1-Wire; Machined Pulley; Satin; 100% New
  • Alternator; 160 AMP Model; GM CS-130 Style; 1-Wire with Internal Regulator; Machined Pulley; Natural Cast Finish; 100% New; Products; Sold Individually
  • Product Attributes:
    • Thread Size: M8-1.25
    • Voltage: 12 Volt
    • Category: Alternators
    • Pulley Diameter: 2 1/2 Inch
    • Feature/Benefit: A Manufacturing Break-through Has Enabled Proform To Offer 100% New Alternators With The Same Affordability As Other Brands' Re-built Models!
    • Part Type: Alternator
    • Wire Type: 1-wire
    • Case Style: Cs-130
    • Regulator Type: Internal
    • Amperage Output: 160 Amp
  • PROFORM's NEW CS130 160 AMP Alternator, for Small Block Chevy 305-350 and Big Block Chevy 402-454 engines, is a 1-wire, CS130 Case Style, complete with Internal Regulator. The External Fan Style Alternator features a Machined Pulley, natural cast finish and is NOT made with re-man components. Each alternator is produced by highly specialized machines, assembled by highly trained personnel using dedicated jigs and equipment - 100% New. Sold individually.

Additional Fitment Information:
Vehicle Block CC Engine Sub Model CID
1987 - Chevrolet R20 L - 6 Cyl 4.8L Silverado 292

Proform
  • Alternator; 100 AMP; GM 1 Wire Style; Machined Pulley; Chrome Finish; 100% New
  • Amperage Output:100 AMP; Case Style:10SI Style; Finish:Chrome
  • Alternator; 100 AMP Model; GM 10si 1 Wire Style With Internal Regulator; Machined Pulley; Chrome Finish; 100% New; Products; Sold Individually
  • Product Attributes:
    • Voltage: 12 Volt
    • Category: Alternators
    • Pulley Diameter: 2 1/2 Inch
    • Feature/Benefit: This Alternator Can Be Clocked To All Four Positions By The User.
    • Applications: Chevy Small Block 305 To 350 Engines 1972 To 1987; Chevy Big Block 402 To 454 Engines 1970 To 1986; Pontiac 326 To 455 Engines 1962 To 1979; Oldsmobile 215 To 455 Engines 1963 To 1984; Buick 215 To 455 Engines 1963 To 1977
    • Part Type: Alternator
    • Wire Type: 1-wire
    • Case Style: 10si Style
    • Regulator Type: Internal
    • Amperage Output: 100 Amp
  • Can you tell the difference? Most chrome alternators look nearly the same, and that's why what's on the inside is so critical. Reliability starts with how it's made. Choosing PROFORM means choosing alternators with components produced by highly specialized machines, assembled by highly trained personnel using dedicated jigs and equipment, with everything 100% new for maximum longevity and optimum performance. After assembly each alternator is individually tested at the factory. Finally, it's boxed with a quality assurance graph that documents the specific unit's output performance. We do the testing, not you! And PROFORM proves it!

Additional Fitment Information:
Vehicle Block CC Engine CID
1987 - Chevrolet R20 V - 8 Cyl 5.0L 305

Powermaster
  • 12si; 100 Amp; 75 Idle; 1V; OE Look; Chrome
  • Alternator; 12si; 100 Amp; 75 Idle; 1V; OE Look; Chrome;
  • Alternator
  • Product Attributes:
    • Amperage: 100 Amp
  • Features:
    • Most Popular Classic Look
    • 100 Plus Amps At Top End/75 Plus Amps At Idle
    • One Unit For 1 Or 3 Wire Operation
    • Individually Dyno Tested with Proof of Performance Guarantee
    • Popular Upgrade For 10DN/10SI/12SI Alternators
  • Powermaster has a variety of alternators available for various applications.

Additional Fitment Information:
Vehicle Block CC Engine CID
1987 - Chevrolet R20 V - 8 Cyl 6.2L 379

Powermaster
  • 12si; 100 Amp; 75 Idle; 1V; OE Look; Polished
  • Alternator; 12si; 100 Amp; 75 Idle; 1V; OE Look; Polished;
  • Alternator
  • Product Attributes:
    • Amperage: 100 Amp
  • Features:
    • Most Popular Classic Look
    • 100 Plus Amps At Top End/75 Plus Amps At Idle
    • One Unit For 1 Or 3 Wire Operation
    • Individually Dyno Tested with Proof of Performance Guarantee
    • Popular Upgrade For 10DN/10SI/12SI Alternators
  • Powermaster has a variety of alternators available for various applications.

Additional Fitment Information:
Vehicle Block CC Engine CID
1987 - Chevrolet R20 V - 8 Cyl 6.2L 379

Powermaster
  • 12si; 150 Amp; 100 Idle; 1V Pulley; Natural
  • Alternator; 12si; 150 Amp; 100 Idle; 1V Pulley; Natural;
  • Alternator
  • Product Attributes:
    • Amperage: 150 Amp
  • Features:
    • Most Popular Classic Look
    • 150 Plus Amps At Top End/100 Plus Amps At Idle
    • One Unit For 1 Or 3 Wire Operation
    • Individually Dyno Tested with Proof of Performance Guarantee
    • High Output Replacement For Early 10DN/10SI/12SI Alternators
  • Powermaster has a variety of alternators available for various applications.

Additional Fitment Information:
Vehicle Block CC Engine CID
1987 - Chevrolet R20 L - 6 Cyl 4.8L 292

Powermaster
  • 12si; 150 Amp; 100 Idle; 1V Pulley; Polished
  • Alternator; 12si; 150 Amp; 100 Idle; 1V Pulley; Polished;
  • Alternator
  • Product Attributes:
    • Amperage: 150 Amp
  • Features:
    • Most Popular Classic Look
    • 150 Plus Amps At Top End/100 Plus Amps At Idle
    • One Unit For 1 Or 3 Wire Operation
    • Individually Dyno Tested with Proof of Performance Guarantee
    • High Output Replacement For Early 10DN/10SI/12SI Alternators
  • Powermaster has a variety of alternators available for various applications.

Additional Fitment Information:
Vehicle Block CC Engine CID
1987 - Chevrolet R20 V - 6 Cyl 4.3L 262

Powermaster
  • 12si; 150 Amp; 100 Idle; 1V Pulley; Chrome
  • Alternator; 12si; 150 Amp; 100 Idle; 1V Pulley; Chrome;
  • Alternator
  • Product Attributes:
    • Amperage: 150 Amp
  • Features:
    • Most Popular Classic Look
    • 150 Plus Amps At Top End/100 Plus Amps At Idle
    • One Unit For 1 Or 3 Wire Operation
    • Individually Dyno Tested with Proof of Performance Guarantee
    • High Output Replacement For Early 10DN/10SI/12SI Alternators
  • Powermaster has a variety of alternators available for various applications.

Additional Fitment Information:
Vehicle Block CC Engine CID
1987 - Chevrolet R20 L - 6 Cyl 4.8L 292

Powermaster
  • 12si; 150 Amp; 100 Idle; 1V; Baffle; Black
  • Alternator; 12si; 150 Amp; 100 Idle; 1V; Baffle; Black;
  • Alternator
  • Product Attributes:
    • Amperage: 150 Amp
  • Features:
    • Most Popular Classic Look
    • 150 Plus Amps At Top End/100 Plus Amps At Idle
    • One Unit For 1 Or 3 Wire Operation
    • Individually Dyno Tested with Proof of Performance Guarantee
    • High Output Replacement For Early 10DN/10SI/12SI Alternators
  • Powermaster has a variety of alternators available for various applications.

Additional Fitment Information:
Vehicle Block CC Engine CID
1987 - Chevrolet R20 L - 6 Cyl 4.8L 292

Powermaster
  • 12si; 150 Amp; 100 Idle; 1V; Baffle; Natural
  • Alternator; 12si; 150 Amp; 100 Idle; 1V; Baffle; Natural;
  • Alternator
  • Product Attributes:
    • Amperage: 150 Amp
  • Features:
    • Most Popular Classic Look
    • 150 Plus Amps At Top End/100 Plus Amps At Idle
    • One Unit For 1 Or 3 Wire Operation
    • Individually Dyno Tested with Proof of Performance Guarantee
    • High Output Replacement For Early 10DN/10SI/12SI Alternators
  • Powermaster has a variety of alternators available for various applications.

Additional Fitment Information:
Vehicle Block CC Engine CID
1987 - Chevrolet R20 V - 8 Cyl 7.4L 454
Showing 1 - 10 of 20 products

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