Availability
March Performance Alternators
59 Customer Reviews
Additional features of March Performance alternators include:
* Easy-to-connect
* High-quality neoprene-sealed bearings for long life
* Ultra-low cut-in voltage regulator maintains amperage at low idle speeds
* High-tech rotors and stators, built with higher copper and steel content, deliver the grea
Additional features of March Performance alternators include:
* Easy-to-connect
* High-quality neoprene-sealed bearings for long life
* Ultra-low cut-in voltage regulator maintains amperage at low idle speeds
* High-tech rotors and stators, built with higher copper and steel content, deliver the greatest output with the best reliability
* Pulley and nose cover sold separately (most models)
Showing In Stock Items. Show All 6 Items.
Alternator and Generators, Ultra Series, GM 10SI, Alternator, 100 amp, 12V, Single Wire, Chrome Finish, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each
Part Number: MCH-P2555-06
Not Yet Reviewed
Estimated Ship Date: Monday 2/9/2026
Estimated Ship Date: Monday 2/9/2026
Alternator, GM 10SI/10DN/12SI Case Style, 12 V, 140 amps, 0.667 in. Dia. Pulley Shaft, Chrome Plated, Buick, Chevrolet, GMC, Oldsmobile, Pontiac, Each
Part Number: MCH-P2556-06
Not Yet Reviewed
Estimated Ship Date: Monday 2/9/2026
Estimated Ship Date: Monday 2/9/2026
Alternator and Generators, Ultra Series, GM 10SI, Alternator, 140 amp, 12V, Single Wire, Black Finish, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each
Part Number: MCH-P2556-08
Estimated Ship Date: Monday 2/9/2026
Estimated Ship Date: Monday 2/9/2026
Alternator and Generators, Ultra Series, GM 10SI, Alternator, 100 amp, 12V, Single Wire, Black Finish, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each
Part Number: MCH-P2555-08
Not Yet Reviewed
Estimated Ship Date: Monday 2/9/2026
Estimated Ship Date: Monday 2/9/2026
Alternator and Generators, Ultra Series, GM 10SI, Alternator, 140 amp, 12V, Single Wire, Polished Finish, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each
Part Number: MCH-P2556-05
Estimated Ship Date: Monday 2/9/2026
Estimated Ship Date: Monday 2/9/2026
Alternator and Generators, Ultra Series, GM 10SI, Alternator, 100 amp, 12V, Single Wire, Polished Finish, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each
Part Number: MCH-P2555-05
Not Yet Reviewed
Estimated Ship Date: Mar 23, 2026 if ordered today
Estimated Ship Date: Mar 23, 2026 if ordered today
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