ALT GM DENSO BLK 250A 6GRV 16.8 PRE

Name: ALT GM DENSO BLK 250A 6GRV 16.8 PRE
Brand: Powermaster
SKU: P01Q 58550-16.8CCW
Price: 629.45 USD
Availability: InStock

$629.45

SKU: P01Q 58550-16.8CCW

Special Order

Ships in 4–6 weeks

Free Shipping

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Description

The Powermaster 58550-16.8CCW is a high-output alternator built on the GM Denso platform, delivering a powerful 250 amps with a preset voltage of 16.8V. Designed for counter-clockwise (CCW) rotation, this model features a black finish, a 6-groove serpentine pulley, and HPR (High Performance Rectifier) technology for enhanced voltage stability and thermal management. It’s ideal for reverse-mount setups, marine applications, and motorsport environments where elevated voltage improves ignition, fuel delivery, and data system performance.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

Brand	Powermaster
Part Number	P01Q 58550-16.8CCW

Videos

PRI 2018: Powermaster Introduces 100mm Denso-Style Alternator

What's in the Box with Powermaster

Grounding the Alternator Housing

Installing a Compact Denso Style Alternator by Powermaster

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy