Start Your Build with a Chassis Expert! Call 435-628-4300
Designed for Autocross, Track & Street Driving
Talk to a Chassis Expert
Classic muscle cars were never engineered for modern tire width, suspension travel, or lateral forces. On track, factory frames and subframes introduce limitations that no bolt‑on part can fix.
A true racing build starts by replacing the foundation, not working around it.
CORRECTED ACKERMANN STEERING GEOMETRY DIAGRAM
Race performance starts with geometry. Speedtech’s suspension systems are designed to optimize tire contact, steering response, and vehicle balance under aggressive load.
The result is a chassis that responds instantly and remains composed when you push harder.
315 TIRES WITH FULL STEERING AND CORRECTED ACKERMANN
Decades of racing feedback have shaped how Speedtech chassis and subframes are designed today. Each platform is tested, refined, and stressed under conditions that expose real weaknesses, not theoretical ones.
Speedtech ExtReme Chassis & Subframe Kits are trusted by professional builders because they deliver repeatable results, on the lift and on track.
It’s a platform designed to support more builds — and better outcomes.
Speedtech designs and builds complete chassis systems, subframes, along with torque arm and independent rear suspension kits engineered as complete kits that deliver serious performance.
Every component is purpose-built to push limits on the track or street, without compromising reliability, durability, or real-world serviceability.
Whether you’re building a purpose‑driven track car or a street‑legal competitor, our solutions provide:
When the foundation is right, everything else performs better.
Smitty’s Custom Auto
“With so many options and opinions, there’s only one choice when it comes to performance!"
Gas Monkey Garage
“Speedtech Performance out of Utah, they have the most badass chassis in the world.”
Team Speedtech
“Turns out that’s what all the fast guys are running! The exact reason I chose Speedtech!”
Team Speedtech
“This car handles sooo good!”
Some racing systems are designed exclusively for off‑road or competition use and may not be street legal.
Speedtech racing systems are built for road course, autocross, time attack, and closed‑course competition.
A racing chassis prioritizes stiffness, adjustability, and track durability, while restomod systems balance street comfort with performance.
Yes, professional installation by a qualified race shop is strongly recommended.
Yes, Speedtech Performance provides technical support and guidance to help optimize suspension setup. Visit speedtechperformance.com/expert-advice to get in touch.