E-Z Sert Seat Insert

The E-Z Sert Seat Insert by ButlerBuilt is purpose-built for drivers and mechanics who demand precision seat support during high-performance driving, racing applications, or extended automotive work. This insert addresses a critical gap in aftermarket seating—the need for adjustable, ergonomic lumbar and lateral support that doesn't require full seat replacement. Whether you're upgrading a race car, street rod, or work vehicle, the E-Z Sert system lets you dial in comfort and control without fabricating custom mounts or compromising original frame integrity.

ButlerBuilt engineered the E-Z Sert insert with modular design principles, allowing straightforward installation into existing seat frames via fastener-based assembly. The insert's structural geometry provides targeted support zones that reduce fatigue during long driving sessions and cornering events, while its compact footprint (14.4 x 10.6 x 22.4 inches) fits most standard and modified bucket seat platforms without excessive bulk. At 12.55 lbs, the insert adds meaningful reinforcement without the weight penalty of heavier full-seat systems, making it ideal for weight-conscious builds and vehicles where every pound matters.

Mechanics and performance enthusiasts benefit most from the E-Z Sert when retrofitting vintage or custom vehicles with modern ergonomic standards, upgrading existing bucket seats, or fine-tuning driver positioning in competition applications. Installation is straightforward for anyone with basic tool proficiency—no welding, drilling of original frames, or specialized knowledge required. The insert pairs well with ButlerBuilt harnesses, racing seats, and custom interior builds, making it a practical choice for street rods, track cars, and restoration projects where originality or clean integration is a priority.