Kartboy Miscellaneous Merchandise

Kartboy: American-Made Subaru Performance Parts Since 1999

Kartboy was born in a San Diego machine shop in 1999, when aerospace fabricator Tom Deadrick grew frustrated with the vague shifts and soft stock components on his Subaru and simply started making better parts himself. What began as a passion project among a tight-knit local community grew into one of the most respected names in Subaru performance. Over 25 years later, every Kartboy part is still designed, CNC-machined, anodized, and assembled in the USA—a commitment that has earned the brand a fiercely loyal following from daily drivers to professional racing teams.

The company operates under the umbrella of All Wheel Engineering, LLC, which was established specifically to meet the growing demand for upgraded Subaru components in the U.S. market. Starting with the Impreza 2.5RS and expanding rapidly with the arrival of the WRX and STI, Kartboy’s product lineup has grown to cover a wide range of Subaru models—including the WRX, STI, Forester, Legacy, BRZ, and Crosstrek. In 2025, Kartboy partnered with the engineering team at Company23 to carry the brand forward with new product development while honoring the original no-nonsense ethos.

What Makes Kartboy Parts Different

Kartboy’s philosophy is simple: fix what the factory got wrong, and do it with parts that outlast the car. The brand’s suspension stabilizer bar links (endlinks) are a perfect example—replacing flimsy OEM plastic-and-rubber units with solid, CNC-machined 6061-T6 aluminum and high-durometer urethane bushings that eliminate flex and transfer sway bar forces properly. The result is sharper cornering response and more predictable handling, whether you’re commuting or carving canyon roads.

In the drivetrain department, Kartboy’s manual transmission shifter assemblies and shifter lever kits are arguably the brand’s most iconic products. The short-throw shifter design dramatically reduces throw length and tightens the shift gate, transforming the driving feel of any Subaru with a manual gearbox. The brand’s innovative crush-tube U-joint design addresses a common problem in the segment: competing solid shifter U-joints often bind when tightened or work loose over time—Kartboy’s solution does both at once, staying tight without binding.

Rounding out the lineup, Kartboy also offers exhaust system hanger brackets—practical, well-engineered pieces that keep your exhaust properly located—and suspension stabilizer bars and related hardware for enthusiasts looking to take their handling upgrades even further. Every product in the Kartboy catalog carries a lifetime warranty, a testament to the confidence the brand has in its own manufacturing quality.

Trusted by Enthusiasts and Racers Alike

Kartboy’s roots run deep in motorsport. Founder Tom Deadrick brought hands-on experience from CART, NHRA, SCCA, and IMSA competition to every product he designed, and that racing DNA shows in the precision and durability of each part. Beyond retail customers, the brand has historically provided consulting services to professional racing programs. Whether you’re building a weekend canyon carver or a full competition vehicle, Kartboy parts are engineered to perform where it counts.