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Tuff Stuff Performance High-Amp Output Alternators

4.49 out of 5 stars 288 Customer Reviews

A Tuff Stuff Performance high-amp output alternator is just what every ride needs. These units produce the most power at idle to keep your battery fully charged at all times. Tuff Stuff products are hand-built with the best bearings, diodes, and copper windings available. The alternators are available in a variety of amperages, case and pulley styles, finishes, and with internal or external regulator. Order the model designed for your specific vehicle application.

Results 1 - 25 of 91

Alternator, One-Wire, GM 10si Case Style, 12 V, 140 amps, Chrome, Serpentine Pulley, Buick, Chevy, Pontiac

Part Number: TFF-7127NK6G

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Today

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Alternator, Chrome, 100 amps, 1-wire, V-Belt, GM, Each

Part Number: TFF-7127ND

4.38 out of 5 stars ( 13 )

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Alternator, Polished, 100 Amps, V-Belt, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: TFF-7127NDP

4.53 out of 5 stars ( 17 )

Estimated Ship Date: Today

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Alternator, 140 Amp, Replacement, V-Belt, Chrome, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: TFF-7127NK

4.68 out of 5 stars ( 19 )

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Alternator, Chrome, 250 Amps, Serpentine, Chevy, Each

Part Number: TFF-8112NE

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

GM alternator LS1 125 amp O.E.M. repl. polished aluminum

Part Number: TFF-8242NAP

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Alternator, Performance, High Amp, GM 10si Case Style, 12 V, 140 Amps, Polished, V-Belt, Each

Part Number: TFF-7127NKP9

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Alternator, Performance, High Amp, GM 10si Case Style, 12 V, 100 Amps, Black Wrinkle Powdercoated, V-belt Pulley, Each

Part Number: TFF-7127NFBWDP

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Alternator, Chrome, 170 Amps, Serpentine, Chevy, Each

Part Number: TFF-8112NA

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 27, 2026 if ordered today

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Alternator, Internal Regulator, 12V, 250 Amp, CS144, V-Belt, Chrome Plated, GM, Each

Part Number: TFF-7290NE

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Today

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Alternator, One-Wire, GM 10si, 12 V, 100 amps, Polished, Serpentine Pulley, Buick, Chevy, Oldsmobile, Pontiac

Part Number: TFF-7127NDP6G

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Alternators and Generators, High-Amp Output Alternators, GM 10si Case Style, 12 V, 140 amps, Polished, Serpentine Pulley, Buick, Chevy, GMC, Jeep

Part Number: TFF-7127NKP6G

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Alternator, Chrome, 170 Amps, Serpentine, Chevy, Pontiac, Each

Part Number: TFF-8173NA

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Alternator, Performance, High Amp, GM 10si Case Style, 12 V, 140 Amps, Polished, V-Belt Pulley, Each

Part Number: TFF-7127NKP

3.5 out of 5 stars ( 8 )

Estimated Ship Date: Today

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Alternator, Performance, High Amp, GM 10si Case Style, 12 V, 140 Amps, Chrome, V-Belt, Each

Part Number: TFF-7127NK12

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Alternator, One-Wire, GM 10si Case Style, 140 amps, Black Chrome, Serpentine Pulley, Buick, Chevy, Pontiac

Part Number: TFF-7127NK6G7

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Alternator, Performance, High Amp, GM 10si Case Style, 12 V, 140 Amps, Polished, V-Belt Pulley, Each

Part Number: TFF-7127NKP12

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Alternator, Performance, High Amp, GM 10si Case Style, 12 V, 140 Amps, Black Wrinkle Powdercoated, V-belt Pulley, Each

Part Number: TFF-7127NKBWDP

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Alternators and Generators, High-Amp Output Alternators, GM 10si Case Style, 12 V, 100 amps, Orange Powdercoat, V-belt Pulley, Chevy, GMC, Jeep, Each

Part Number: TFF-7127NFORANGE

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Apr 27, 2026 if ordered today

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Alternator, Internal Regulator, 12V, 170 Amp, CS144, Serpentine, Chrome Plated, GM, Each

Part Number: TFF-7290NA6G

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Alternator, Polished, 250 Amp, Serpentine, Chevy, GMC, Each

Part Number: TFF-8219NEP

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Alternators and Generators, High-Amp Output Alternators, GM CS130D Case Style, 12 V, 140 amps, Chrome, Serpentine Pulley, Chevy, Pontiac, 5.7L LS

Part Number: TFF-8242NC

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Alternator, Performance, High Amp, GM 10si Case Style, 12 V, 140 Amps, Polished, V-Belt Pulley, Each

Part Number: TFF-7127NKP6

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Alternator, Performance, High Amp, GM 10si Case Style, 12 V, 100 Amps, Polished, Serpentine Pulley, Each

Part Number: TFF-7127NDP6G12

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

Alternator, 65 Amp, Replacement, V-Belt, Chrome, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: TFF-7127NJ

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today