Powermaster HPR Large Frame Series Alternators

4.44 out of 5 stars 9 Customer Reviews

Today's modern hot rods require more current than ever, especially at idle and low engine speeds. Powermaster engineered a new alternator to update the late model h

Today's modern hot rods require more current than ever, especially at idle and low engine speeds. Powermaster engineered a new alternator to update the late model hairpin technology used from the factory with the new HPR Large Frame Series alternator! Available for a number of late model V8 engine platforms; these hairpin replacement alternators provide more than enough amps to power the accessories of a modern motor.
Features include:
* Simple and effective one-wire or OE style connections available
* 195 amps at idle, 215 amps while cruising, and 250 amps at top end
* Voltage compatibility: 12 V and optional 14 V and 16 V
* Efficient internal components produce more output, while consuming less engine power
* Direct bolt-in to OEM and most aftermarket brackets
* Supplied with a factory spec decoupler, solid, clutch or underdrive pulley
* Stock diameter pulley accepts the factory belt
* Available in cast, black and polished finish
* Proof of performance with included dyno tag

Note: One wire alternators will bypass the factory ECU.

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Powermaster HPR Large Frame Series Alternators 48550-1

Powermaster HPR Large Frame Series Alternators 48550-1

Alternator, High-Amp, 1-Wire, 250 amp, Serpentine, Natural Finish, Denso Case, Internal Regulator, Cadillac, Chevy, GMC, Each

Part Number: PWM-48550-1

Not Yet Reviewed

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Powermaster HPR Large Frame Series Alternators 48550

Alternator, High-Amp, 250 amp, 12 V, Serpentine, Natural Finish, Denso Case, Internal Regulator, Cadillac, Chevy, GMC, Each

Part Number: PWM-48550

4.38 out of 5 stars ( 8 )

Estimated Ship Date: Today

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Powermaster HPR Large Frame Series Alternators for 2014-2019 SIERRA 1500, SILVERADO 1500 - 585503-1

Alternator, Street Alternators, 12V, 250 amps, Satin Black, Under Drive Serpentine Pulley, Each

Part Number: PWM-585503-1

Not Yet Reviewed

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Powermaster HPR Large Frame Series Alternators 58550-4

Alternator, HPR, 250 amp, 12 V, 1-Wire, Serpentine, Black Finish, Denso Case, Internal Regulator with Dash Light, Cadillac, Chevy, GMC, Each

Part Number: PWM-58550-4

Not Yet Reviewed

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Powermaster HPR Large Frame Series Alternators for 2011-2017 F-150 - 41624

Alt Ford Denso Nat'l 250A F150 6 grv Pulley Side Batt Post/Reg

Part Number: PWM-41624

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Powermaster HPR Large Frame Series Alternators 54007W

Alternator, HPR Diesel Alternator, 12V, 250 amps, Textured Black, Serpentine Pulley, Each

Part Number: PWM-54007W

Not Yet Reviewed

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Powermaster HPR Large Frame Series Alternators 48550-4

Alternator, High-Amp, 250 amp, 12 V, 1-Wire, Serpentine, Natural Finish, Denso Case, Internal Regulator with Dash Light, Cadillac, Chevy, GMC, Each

Part Number: PWM-48550-4

Not Yet Reviewed

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Powermaster HPR Large Frame Series Alternators 58550-1

Alternator, Street Alternators, 12V, 250 amps, Satin Black, Serpentine Pulley, Each

Part Number: PWM-58550-1

Not Yet Reviewed

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Powermaster HPR Large Frame Series Alternators for 1955-2019 CORVETTE - 417943

Alternator, Internal Regulator, 245 Amp, 6-Groove, Natural, Serpentine, Chevrolet, 6.2L, Each

Part Number: PWM-417943

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Powermaster HPR Large Frame Series Alternators 51627W

Alternator, HPR Diesel Alternator, 12V, 250 amps, Textured Black, Serpentine Pulley, Each

Part Number: PWM-51627W

Not Yet Reviewed

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Powermaster HPR Large Frame Series Alternators for 1955-2019 CORVETTE - 417943-1

Alternator, Internal Regulator, 245 Amp, 6-Groove, Natural, Serpentine, One-Wire, Chevrolet, 6.2L, Each

Part Number: PWM-417943-1

Not Yet Reviewed

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Powermaster HPR Large Frame Series Alternators for 2014-2019 CORVETTE - 61794

Alternator, 250 Amp, With Decoupler Pulley, Serpentine, 2-Pin, OE RVC, Chevy, Each

Part Number: PWM-61794

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Powermaster HPR Large Frame Series Alternators for 2015-2020 F-150 - 54005

Alt Ford Denso Black 250A F150 6 grv Decoupler Pulley Side Batt Post/Reg

Part Number: PWM-54005

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Powermaster HPR Large Frame Series Alternators 64007

Alternator, HPR Large Frame, 250 Amp, Polished, Internal Regulator, Serpentine Pulley, Chevy, Cadillac, GMC, Each

Part Number: PWM-64007

5.0 out of 5 stars ( 1 )

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Powermaster HPR Large Frame Series Alternators for 2011-2020 F-150 - 51532

Alt Ford Denso Black 245A F150 6 grv Pulley Side Batt Post/Rear Reg

Part Number: PWM-51532

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Powermaster HPR Large Frame Series Alternators for 2015-2020 F-150 - 44005

Alt Ford Denso Nat'l 250A F150 6 grv Decoupler Pulley Side Batt Post/Reg

Part Number: PWM-44005

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Powermaster HPR Large Frame Series Alternators 58550

Alternator, Street Alternators, 12V, 250 amps, Satin Black, Serpentine Pulley, Each

Part Number: PWM-58550

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

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