We help determine what are the best 10-spline quick change gear ratios for your street or racing needs

Quick Change Gear Chart | RPM Gear Ratio Formula for 10-Spline

This article demonstrates how to install a complete Winters quick change kit with additional parts including birdcages, brackets, and calipers for a modified race car.

Quick Change Bolt On Components for a Modified Race Car

Tim talks about our Winters quick change rear end & components.

Speedway Tech Talk - Quick Change Rear Ends & Components

Speedway Motors announced today the introduction of a new IMCA Modified Spec Racing Engine as they kick off the 2025 race season along with discounts Jan. 27-Feb. 2 to help their customers get ready for race season.

Speedway Motors Introduces New IMCA Modified Spec Racing Engine as they Kick Off 2025 Race Season 

Speedway Motors, a manufacturer, retailer, and distributor of high-quality automotive parts and racing products, will introduce a number of new products in their booth (#23791) at the 2025 SEMA Show Nov. 4-7 in Las Vegas, Nev.

Speedway Motors Introduces New Products at 2025 SEMA Show

Speedway Motors, a manufacturer, retailer, and distributor of high-quality automotive parts and racing products, will introduce new racing products in their booth (#4101) at the 2025 PRI Show Dec. 11-13 in Indianapolis, Ind.

Speedway Motors to Introduce New Racing Products at 2025 PRI Show

Learn a few tips on how to properly mount Modified bodies and some products that will help get your race car body fabrication job done!

How to Mount a Modified Race Car Body

Not sure what to get that race car driver in your life? Don’t worry, we’ve got your back this holiday season with our 2023 gift guide!

Top Holiday Gifts for Race Car Drivers 2023

Watch this video to learn how to make your racecar legal for 2018. Greg, Speedway's race product manager, explains the new rules to help get you ready for this season.

Speedway Tech Talk - Rule Changes for 2018

Speedway Motors just added some exciting new options to our line of racing harnesses.

New Racing Safety Products from Speedway Motors: Harnesses

Engine Family Facets

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Modified Winters Championship Quick Change Speedway Motors Quick Change Gear Service Kits Parts

Modified Winters Championship Quick Change Speedway Motors Quick Change Gear Service Kits Parts | Speedway Motors

Shop Modified Winters Championship Quick Change Speedway Motors Quick Change Gear Service Kits Parts and get Free Shipping on orders over $175 at Speedway Motors.

Modified Winters Championship Quick Change Speedway Motors Quick Change Gear Service Kits Parts

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Speedway Motors Quick Change Gear Service Kit, Polished LW Gears