SKU: STGD1549
UPC: 679460100140
MPN: D1549
The STRANGE 33-Spline Lightweight Pro-Race Spool for GM 12-Bolt differentials is a purpose-built component designed for high-performance automotive applications where rotational efficiency and weight savings are critical. This steel spool is engineered for full-size GM 12-bolt housings and delivers the direct power distribution characteristics required in drag racing, land speed racing, and serious street performance builds where wheel hop and tire slip control demand a locked or heavily limited differential.
At 9.75 pounds, the lightweight construction minimizes rotational inertia—a measurable advantage in acceleration and launch consistency. The 33-spline engagement matches OEM GM 12-bolt specifications, ensuring proper mesh with factory and upgrade axle shafts without modification. Steel construction provides the durability required for repeated high-torque events and sustained performance driving. The pro-race design prioritizes straight-line power delivery, making this spool the choice for racers who prioritize repeatability and consistency over street maneuverability in tight corners.
This component is intended for dedicated race vehicles, competition trucks, and serious performance cars where a locked or heavily biased differential is accepted or preferred. Buyers should verify compatibility with their specific axle shaft spline count and housing configuration before ordering. Installation requires professional service and proper bearing preload setup to ensure safe operation.
STRANGE is recognized in the performance automotive market for manufacturing high-quality differential components and driveline products. The 33-spline standard is the industry baseline for full-size GM 12-bolt housings found in trucks, performance sedans, and dedicated race platforms from the 1960s through modern restorations and builds.
Order the STRANGE D1549 pro-race spool for GM 12-bolt from TacticalSurplusUSA and ensure your differential delivers consistent, locked power transfer on the launch pad or drag strip.
WARNING ⚠️
You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
Purchasing a Firearm? Click HERE to see our firearm purchasing guide.
