$5 Off Your $100 Mobile App Purchase - Get the App

$5 Off Your $100 Mobile App Purchase - Get the App

Summit Racing Gift Cards - ALWAYS the Perfect Gift!

Selected Filters


Loading...

Availability


Tuff Stuff Performance High-Amp Output Alternators

4.49 out of 5 stars 287 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 61

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

...Loading

Estimated Ship Date: Today

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

Part Number: TFF-7127ND

4.38 out of 5 stars ( 13 )

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

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 )

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

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

...Loading

Estimated Ship Date: Today

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

...Loading

Estimated Ship Date: Today

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

...Loading

Estimated Ship Date: Today

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

...Loading

Estimated Ship Date: 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

...Loading

Estimated Ship Date: Today

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

...Loading

Estimated Ship Date: Today

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: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 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: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 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: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 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: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 2026 if ordered today

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: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 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: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 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: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 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: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 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: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 2026 if ordered today

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

Part Number: TFF-7127NK7

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 2026 if ordered today

Alternator, Performance, High Amp, GM 10DN Case Style, 12 V, 80 Amps, Black Wrinkle Powdercoated, External Regulator, V-Belt, Each

Part Number: TFF-7102BW

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 2026 if ordered today

Alternator, Performance, High Amp, GM 10si Case Style, 12 V, 100 Amps, Chrome, V-Belt Pulley, Each

Part Number: TFF-7127ND6

Not Yet Reviewed

Estimated Ship Date: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 2026 if ordered today

Alternator, Chrome, 100 Amps, Serpentine, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: TFF-7127ND6G

4.67 out of 5 stars ( 6 )

Estimated Ship Date: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 2026 if ordered today

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

Part Number: TFF-7127RATGRAY

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 2026 if ordered today

Alternator, Performance, High Amp, GM 10si Case Style, 12 V, 100 Amps, Chrome, V-Belt, Each

Part Number: TFF-7127ND9

Not Yet Reviewed

Estimated Ship Date: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 2026 if ordered today

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

Part Number: TFF-7127NDP9

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 25, 2026 if ordered today

...Loading

Estimated Ship Date: Mar 25, 2026 if ordered today

Modal Header

Call To Order

This is a custom order part. You can order this part by Contacting Us.