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Home
Access Cover
Powermaster
On Sale
Performance Parts

120 Amperes Access Cover One-Wire Performance Parts

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Amps
120 Amperes
Brand
Access Cover
Powermaster
Wiring
One-Wire

Fitment

Direct Fit (1)
Universal Fit (3)

Amps

50 Amperes (16)
60 Amperes (2)
65 Amperes (1)
70 Amperes (3)
75 Amperes (10)
80 Amperes (2)
85 Amperes (1)
90 Amperes (7)
95 Amperes (4)
100 Amperes (42)
View More
105 Amperes (22)
130 Amperes (5)
140 Amperes (66)
150 Amperes (5)
200 Amperes (1)
255 Amperes (1)

Finish

Black (3)
Chrome (1)

Part Type

Alternator (1)
Alternators (3)

Price Range

$200 to $299 (1)
$400 to $499 (3)

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120 Amperes Access Cover One-Wire On Sale

4 Product Groups

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Powermaster Street Alternators

Powermaster Alternators

From $263.99

Available in Natural or Polished finish
Bolt on installation
Uses same belt as the factory
Delivers up to 50% more output at idle
California Residents: WARNING

From $263.99

4.6 4.6 (459)

Powermaster Racing Alternators

Powermaster Racing Alternator

From $483.99

Racing Alternator
California Residents: WARNING

From $483.99

Powermaster Denso Racing Alternators

Powermaster Denso Racing Alternator

From $470.99

Denso Racing Alternator
California Residents: WARNING

From $470.99

Powermaster XS Volt Denso Racing Alternator

From $495.99

XS Volt Denso Racing Alternator
California Residents: WARNING

From $495.99

4 Products

Switch to View Product Groups

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Powermaster GM 17si Alternator (Chrome) - 17290

Part Number: POW17290

Powermaster GM 17si Alternator (Chrome) - 17290

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How to Get it

Free! Curbside & In-Store Pickup: Select A Store Near You

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Fitment: Direct Fit
Chrome
120 Amp
One wire
Includes 1V pulley
California Residents: WARNING

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PROMOTIONS AUTOMATICALLY APPLIED

We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!

SHOP 4WP's HUGE SELECTION

Qualifies for Free Shipping

$263.99

On Backorder

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Powermaster GM 17si Alternator (Chrome) - 17290

Part #: POW17290

$263.99

On Backorder

Email me when this product comes in stock

+ Add to Wishlist

LOW PRICE GUARANTEE

EASY RETURNS

How to Get it

Free! Curbside & In-Store Pickup: Select A Store Near You

Ship to Home:

On Backorder

Fitment: Direct Fit
Chrome
120 Amp
One wire
Includes 1V pulley
California Residents: WARNING

+ View More Specs

- View Less Specs

PROMOTIONS AUTOMATICALLY APPLIED

We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!

SHOP 4WP's HUGE SELECTION

4WP PROTECTION PLAN

Our Protection Plan covers your investment above and beyond the manufacturer's coverage. For only 10% more, if your item is damaged, fails or malfunctions, we'll replace it for free!

No, thanks

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Powermaster Denso Racing Alternator (Black) - 8142

Part Number: POW8142

Powermaster Denso Racing Alternator (Black) - 8142

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How to Get it

Free! Curbside & In-Store Pickup: Select A Store Near You

Ship to Home:

On Backorder

Fitment: Universal Fit
Denso Racing Alternator
120 Amp
Black
12V
Small
One Wire
California Residents: WARNING

+ View More Specs

- View Less Specs

PROMOTIONS AUTOMATICALLY APPLIED

We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!

SHOP 4WP's HUGE SELECTION

Qualifies for Free Shipping

$470.99

On Backorder

Email me when this product comes in stock

+ Add to Wishlist

LOW PRICE GUARANTEE

EASY RETURNS

Powermaster Denso Racing Alternator (Black) - 8142

Part #: POW8142

$470.99

On Backorder

Email me when this product comes in stock

+ Add to Wishlist

LOW PRICE GUARANTEE

EASY RETURNS

How to Get it

Free! Curbside & In-Store Pickup: Select A Store Near You

Ship to Home:

On Backorder

Fitment: Universal Fit
Denso Racing Alternator
120 Amp
Black
12V
Small
One Wire
California Residents: WARNING

+ View More Specs

- View Less Specs

PROMOTIONS AUTOMATICALLY APPLIED

We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!

SHOP 4WP's HUGE SELECTION

4WP PROTECTION PLAN

Our Protection Plan covers your investment above and beyond the manufacturer's coverage. For only 10% more, if your item is damaged, fails or malfunctions, we'll replace it for free!

No, thanks

Sign In Or Create an Account

Create An Account

Email Address

Password

Remember me

Reset Password

An email is sent to .

Enter email address to change your password

After you submit your email address, you'll receive an email a link that will let you change your password.

Email*

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Email Address

Password

Remember me

Reset Password

Create An Account

First Name *:

Last Name *:

Email *:

Password *:

Must be at least 8 alphanumeric characters long and must contain at least 1 number.

Confirm Password *:

Yes, I would like to receive emails with the latest deals and specials.

Add to Wishlist

Powermaster Racing Alternator (Black) - 8146

Part Number: POW8146

Powermaster Racing Alternator (Black) - 8146

Be the first to review

How to Get it

Free! Curbside & In-Store Pickup: Select A Store Near You

Ship to Home:

On Backorder

Fitment: Universal Fit
Racing Alternator
Denso
120 Amp.
Natural
One Wire
16V
California Residents: WARNING

+ View More Specs

- View Less Specs

PROMOTIONS AUTOMATICALLY APPLIED

We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!

SHOP 4WP's HUGE SELECTION

Qualifies for Free Shipping

$483.99

On Backorder

Email me when this product comes in stock

+ Add to Wishlist

LOW PRICE GUARANTEE

EASY RETURNS

Powermaster Racing Alternator (Black) - 8146

Part #: POW8146

$483.99

On Backorder

Email me when this product comes in stock

+ Add to Wishlist

LOW PRICE GUARANTEE

EASY RETURNS

How to Get it

Free! Curbside & In-Store Pickup: Select A Store Near You

Ship to Home:

On Backorder

Fitment: Universal Fit
Racing Alternator
Denso
120 Amp.
Natural
One Wire
16V
California Residents: WARNING

+ View More Specs

- View Less Specs

PROMOTIONS AUTOMATICALLY APPLIED

We Pay the Sales Tax - 4th Of July Sale Weekend At 4WP!

SHOP 4WP's HUGE SELECTION

4WP PROTECTION PLAN

Our Protection Plan covers your investment above and beyond the manufacturer's coverage. For only 10% more, if your item is damaged, fails or malfunctions, we'll replace it for free!

No, thanks