Michigan Motorsports Four Pole 58X 3-Bolt Cam Gear Sprocket

In this review the Michigan Motorsports Four Pole 58X 3-Bolt Cam Gear Sprocket is evaluated as a direct replacement cam sprocket for Gen IV LS engines. The bottom line: this part is for builders and technicians who need a precise, OEM-style cam signal for 58X crank reluctor systems; its four-pole design and 3-bolt fit make it the single best swap when replacing GM Part #12586481 on 4.8L, 5.3L, 5.7L, and 6.0L LS engines. The reviewer found it reliable in stock and performance timing setups and particularly valuable when accurate ECU synchronization is required.

Key Features

• Direct replacement: Made to replace GM Part #12586481 so installers can expect a factory-style fit on LS2, LS3, and other Gen IV engines.
• Four-pole signal: The 4X pickup provides a clean cam signal for engines using a 58X crank reluctor, improving ECU timing accuracy and ignition control.
• Engine compatibility: Designed specifically for 4.8L, 5.3L, 5.7L, and 6.0L LS-based engines, reducing fitment guesswork during rebuilds or swaps.
• Durable construction: Precision-machined from heat-treated, high-strength material to resist wear at high RPMs and under increased power demands.
• Timing chain compatibility: Works with both stock and aftermarket timing chains, so it fits in stock rebuilds and modified, high-performance builds.

Who It's For

This cam sprocket suits engine builders, professional mechanics, and DIY enthusiasts replacing a worn or damaged cam gear on Gen IV LS platforms that use a 58X crank reluctor. It is particularly useful when accurate cam position sensing is required for EFI tuning, high-RPM operation, or when swapping components that must retain factory signal characteristics.

Those who should look elsewhere include owners of older LS generations that do not use a 58X crank reluctor or anyone needing an adjustable or lightweight aftermarket cam gear for extreme motorsport applications; this is a direct replacement OEM-style part, not a performance-adjustable sprocket.

Pros & Cons

Pros

• Direct OEM-style fit for GM Part #12586481 replacements, simplifying installation.
• Four-pole design yields consistent cam signal for proper ECU communication on 58X-equipped engines.
• Robust, precision-machined construction tolerates high RPMs and modified engine conditions.

Cons

• Not adjustable; builders seeking timing fine-tuning will need a different aftermarket cam gear.

Specifications

Our Verdict

The Michigan Motorsports Four Pole 58X 3-Bolt Cam Gear Sprocket is a sensible, cost-effective choice for anyone needing a precise, OEM-style cam signal on Gen IV LS engines. It delivers durable construction and the correct four-pole output for 58X systems, making it good value for stock rebuilds and many performance builds where adjustability is not required.

Frequently Asked Questions

Will this fit my LS3?
Yes, the sprocket is specified as compatible with LS3 and other Gen IV LS engines using a 58X crank reluctor.

Is this sprocket adjustable for timing?
No, this is a direct OEM-style 3-bolt replacement and does not provide adjustable timing features.

Can I use it with aftermarket timing chains?
Yes, it is designed to work with both OEM and aftermarket timing chain sets.