OPGI.com works best with JavaScript enabled.
Early Black Friday! Save up to 20% off Restoration! - use code: BIGDEAL20W
  • As seen on
  • Rust Valley Restorers
  • All Girls Garage

Powermaster

Alternator, Powermaster, 1954-88 GM, CS121, 100A, 1v Pulley

Fits 1964–1973 GTO View fitment for 19 models
Part# PM30462
Mfg# 28462
Sold As Each
$249.99
List Price: $275.95
You Save $25.96
Low Stock
Only a few left for immediate delivery

Color Variation

Due to variations in monitor settings, some colors on this page may appear slightly different from GM originals. In addition, due to color differences in the original GM dye lots, interior product colors may vary slightly.

Add To Wishlist 

Proven performance!

Compact design for maximum clearance!

Powermaster CS121 Style Alternators are manufactured using only the highest quality components. These "5x5" Compact Alternators are avaliable in 1V or 6-rib 100amp or 100amp XS VOLT™ featuring user adjustable voltage set points between 13.5-18.5 volts. Great for 12v-14v, and 16v systems, the set points are adjustable via adjusting screw on the back of the alternator housing. The CS121 has a side battery post, fits in "5x5"space which resolves clearance issues and one unit for 1 wire or 3 OE hookup, great for both hot rods and race applications. These alternators Feature a 6.14" Straight Mount with a 5"x5" housing for additional clearance. 100AMP break down: 60A at Idle, 90A at Cruise and 100A at Top end.

Notes

  • This item is not eligible for any further discounts or promotional pricing.

Find Item In This Catalog

  • 2023 Cadillac 1936-1993 137
WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Vehicle Fitment

Year Make Model Application Details
1982 Buick Grand National  
1984–1987 Buick Grand National  
1978–1987 Buick Regal  
1963–1976 Buick Riviera w/1v pulley
1961–1972 Buick Skylark w/1v pulley
1983–1987 Buick T-Type  
1959–1976 Cadillac DeVille w/1v pulley
1954–1976 Cadillac Eldorado w/1v pulley
1954–1976 Cadillac Fleetwood w/1v pulley
1954–1976 Cadillac Series 62 w/1v pulley
1976 Cadillac Seville w/1v pulley
1964–1977 Chevrolet Chevelle w/1v pulley
1964–1987 Chevrolet El Camino 1964–1977: w/1v pulley
1978–1987: w/1v pulley
1978–1983 Chevrolet Malibu w/1v pulley
1970–1988 Chevrolet Monte Carlo 1970–1977: w/1v pulley
1978–1988: w/1v pulley
1961–1987 Oldsmobile Cutlass 1961–1977: w/1v pulley
1978–1987: w/1v pulley
1959–1977 Pontiac Bonneville w/1v pulley
1982–1986 Pontiac Bonneville w/1v pulley
1959–1977 Pontiac Catalina w/1v pulley
1962–1987 Pontiac Grand Prix 1962–1977: w/1v pulley
1978–1987: w/1v pulley
1964–1973 Pontiac GTO w/1v pulley
  • Headshot of OPGI Employee
    Have a Question? Chat with an Expert or Call 1‑800‑243‑8355
    Mon‑Fri 8:00‑4:30 PT Experts are currently offline
  • Low Prices. Price Match Guarantee
  • GM Automotive Experts. We know car parts
  • Guaranteed Fitment. 100% factory accurate
  • Superior Selection. Largest selection of in-stock parts

Customers Who Viewed This Item Also Viewed

Reviews (0)

UH OH! Product reviews didn't load.
Please reload the page, or unblock our review partner Yotpo.com.