MechMan S Series Alternators

4.52 out of 5 stars 31 Customer Reviews

MechMan S Series 6-phase alternators offer incredible output in a compact and durable package. The 240 amp models offer the best balance between peak output, and ou

MechMan S Series 6-phase alternators offer incredible output in a compact and durable package. The 240 amp models offer the best balance between peak output, and output at engine idle RPM; while the 320 amp models are all about max power and not designed to charge at low idle speeds. Both S Series alternators feature 12 diodes, twin rectifier plates, and outstanding airflow ensure long service life, even in severe conditions. These units come equipped with a smaller 1.75 in. diameter alternator pulley, and will require a slightly shorter drive belt to be installed for proper belt tension. Order the model recommended

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MechMan S Series Alternators 7127240B

Alternator, S Series, 12 V, 240 amps, Black, Satin Finish, One Wire, Serpentine Pulley, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: MEH-7127240B

3.5 out of 5 stars ( 4 )

Estimated Ship Date: Monday 1/26/2026

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Estimated Ship Date: Monday 1/26/2026

MechMan S Series Alternators 7127170B

MechMan S Series Alternators 7127170B

Alternators and Generators, S Series Alternators, 12 V, 170 amps, Black, Satin Finish, Serpentine Pulley/V-Pulley, Buick, Cadillac, Chevy, GMC, Each

Part Number: MEH-7127170B

4.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 1/26/2026

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Estimated Ship Date: Monday 1/26/2026

MechMan S Series Alternators 7127320P

Alternator, S Series Alternator, 12 V, 320 amps, Polished, Serpentine Pulley, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: MEH-7127320P

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 1/26/2026

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Estimated Ship Date: Monday 1/26/2026

MechMan S Series Alternators 7127240P

Alternator, S Series Alternator, 12 V, 240 amps, Polished, One Wire, Serpentine Pulley, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: MEH-7127240P

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 1/26/2026

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Estimated Ship Date: Monday 1/26/2026

MechMan S Series Alternators 7127170C

Alternators and Generators, S Series Alternators, 12 V, 170 amps, Chrome, Serpentine/V-Belt Pulley, Buick, Cadillac, Chevy, GMC, Pontiac, Each

Part Number: MEH-7127170C

2.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 1/26/2026

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Estimated Ship Date: Monday 1/26/2026

MechMan S Series Alternators 7127320

Alternator, S Series Alternator, 12 V, 320 amps, Natural, Serpentine Pulley, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: MEH-7127320

Not Yet Reviewed

Estimated Ship Date: Monday 1/26/2026

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Estimated Ship Date: Monday 1/26/2026

MechMan S Series Alternators 7127320B

Alternator, S Series Alternator, 12 V, 320 amps, Black, Serpentine Pulley, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: MEH-7127320B

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 1/26/2026

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Estimated Ship Date: Monday 1/26/2026

MechMan S Series Alternators 7127240C

Alternator, S Series Alternator, 12 V, 240 amps, Chrome, One Wire, Serpentine Pulley, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: MEH-7127240C

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 1/26/2026

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Estimated Ship Date: Monday 1/26/2026

MechMan S Series Alternators 7127170P

Alternators and Generators, S Series Alternators, 12 V, 170 amps, Polished, Serpentine Pulley/V-Belt, Buick, Cadillac, Chevy, GMC, Oldsmobile, Each

Part Number: MEH-7127170P

Not Yet Reviewed

Estimated Ship Date: Monday 1/26/2026

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Estimated Ship Date: Monday 1/26/2026

MechMan S Series Alternators 8237170

170 amp high output racing alternator for GM LS brackets

Part Number: MEH-8237170

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 1/26/2026

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Estimated Ship Date: Monday 1/26/2026

MechMan S Series Alternators for 2000-2005 DEVILLE - 13919240

240 amp alternator for Cadillac V8 4.6L

Part Number: MEH-13919240

Not Yet Reviewed

Estimated Ship Date: Monday 1/26/2026

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Estimated Ship Date: Monday 1/26/2026

MechMan S Series Alternators for 2004-2009 SRX, 2005-2009 STS - 11046240

S Series 240a racing alternator for STS - SRX

Part Number: MEH-11046240

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

MechMan S Series Alternators for 2006-2009 PT CRUISER, 2007-2009 STS - 11244240

S Series 240 amp Alternator for PT Cruiser Turbo Late

Part Number: MEH-11244240

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

MechMan S Series Alternators for 2007-2009 SRX - 11248240

S Series 240 amp Alternator for 4.6L Cadillac Late

Part Number: MEH-11248240

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

MechMan S Series Alternators for 2000-2005 DEVILLE - 13919320

320 Amp Alternator For Cadillac V8 4.6L

Part Number: MEH-13919320

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

MechMan S Series Alternators for 2005-2007 CTS - 11044240

S Series 240a racing alternator for CTS

Part Number: MEH-11044240

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

MechMan S Series Alternators for 2006-2011 DTS, LUCERNE - 11178240

S Series 240 amp alternator for 4.6L Cadillac Lucerne

Part Number: MEH-11178240

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

MechMan S Series Alternators for 2007-2009 STS - 11247240

S Series 240 amp Alternator for 4.4L Cadillac Late

Part Number: MEH-11247240

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

MechMan S Series Alternators for 2003-2004 CTS - 11003240

240 amp alternator for Cadillac 3.2L

Part Number: MEH-11003240

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

MechMan S Series Alternators for 2007-2009 SRX - 11038240

240 amp alternator for Late model Cadillac 4.6L

Part Number: MEH-11038240

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

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