Powermaster CS121 Style Alternator


Powermaster
Powermaster CS121 Style Alternator

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  • True one wire hookup with set voltage of 14.6
  • High output to weight ratio; excellent idle output
  • Proof of Performance tag
  • Gold Battery Post

    GM has offered several series of alternators over the years, each time taking a step up in performance. The great thing about these alternators and aftermarket brackets is that for the most part they are interchangeable. Starting with the externally regulated 10dn alternator of the 1960s and moving all the way to the CS130D alternator of late, aftermarket brackets with rod end tensioners will interchange. The 2" mounting foot width is common to all of them and the 6.61" bolt spacing is common (except the CS130D. the CS130D is a 7.24" bolt spacing although many brackets will accommodate this.)

    CS121 Alternators
    75A Specifications
  • 60A @ 2,400 rpm @ 7.2 VDC @ 77F
  • Operating Range: -40C to 150C
  • Max rpm: 18,000

    100A Specifications
  • 60A @ 2,400 rpm @ 13.2 VDC @ 77F
  • Operating Range: -40C to 150C
  • Max rpm: 18,000



  • 100 Amp

    713-8062
    Black GM Delco-Style Alternator
  • 100 amps
  • 1 wire hookup
  • Does Not Include Charging Wire or Pulley
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    Fits Applications
  • $241.99
    Ships
    05/29/12

    713-8072
    Black GM Delco CS121 Alternator
  • 100 amps
  • 1 wire hookup
  • Fits 3-bolt bracket only
  • Does Not Include Charging Wire
    View this item

    Fits Applications
  • $241.99
    Ships
    05/29/12
    75 Amp

    713-8060
    Natural GM Delco-Style Alternator
  • 75 amps
  • 1 wire hookup
  • Does Not Include Charging Wire
    View this item

    Fits Applications
  • $153.99
    Ships
    05/29/12