A. Each ExtReme frame is Jig welded in our manufacturing facility in St. George, Utah, USA. Individual frame rail components are laser cut and CNC formed to ensure consistent close tolerances and are tab-through internally gusseted construction for superior strength. Includes all factory based mounting points for an easy bolt-in installation.
B. ExtReme frame rails and crossmembers are designed to allow the most available ground clearance with aggressively low ride heights. Run-through, large tubing exhaust ports along with our custom headers keep the entire exhaust above the frame rails.
C. ExtReme CNC formed tubular transmission cross member works in conjunction with engine mounts to help achieving optimum pinion angle. Our adjustable cross member allows a wide range of mounting positions that allows near any GM engine and transmission combination.
D. ExtReme tubular control arms are CNC cold formed and precision TIG welded for superior strength and consistency. They feature ultra high clearance profiles for more steering angle, additional built in caster and camber gain geometry, billet stainless cross shafts with adjustable caster shims, Delrin bushings and performance ball joints.
E. ATS ExtReme front spindles allow any C5/C6 Corvette based caliper to bolt directly on. Rear brakes are based on the popular 9” Ford axle. These types of mounting bosses allow a wide range of brake options, from mild to wild. Speedtech Performance is a direct dealer for both Baer and Wilwood brake systems so we can help customize your brake package specifically to your needs.
F. Performance Rack and Pinion steering systems are standard with all ExtReme chassis and subframe packages. Rack and pinion offers precision steering with a quicker feel and better feedback in a lighter weight package.
G. Exclusive to our ExtReme suspensions are race tuned, three piece splined sway bars. This allows each individual chassis or subframe to be custom fit with sway bar spring rates specific to your vehicle and driving style.
H. Race valved Viking Crusader double adjustable coilovers are standard ExtReme equipment. Your choice of spring rate, both compression and rebound valve adjustment, and easy ride height changes allows complete tuneability for street cruising to full race settings. Ridetech and JRI are also available shock options.
I. Better than any other spindle available, our NEW forged 7075 aluminum ATS ExtReme spindles offer reduced KPI/SAI angle, max Ackermann, virtually ZERO bump steer, up to 30 degrees of steering angle, low scrub radius, heavy duty C7 Corvette hubs, and C6 based caliper mounting.
J. A perfect match to our ExtReme suspension, our Torque Arm is superior to leaf spring and 4 link type systems, allowing the most amount of suspension travel without bind. Our design offers easy ride height, roll center, pinion angle, instant center, and wheelbase adjustability, with more clearance than competitor’s systems.
K. Speedtech Performance’s exclusive Articulink design allows smooth suspension travel without the bind that plagues rigid trailing arms. Standard equipment on all ExtReme suspensions, Articulink control arms are adjustable for correct pinion angle, instant center and wheel location.
L. Exclusive to ExtReme suspensions is the option of a splined rear sway bar. Not only can you order your choice of bar spring rate, the arms have three end link mounting positions for fine tuning the bar to your specific vehicle.
M. ExtReme full chassis systems include a 9” Ford axle housing, large bearing Torino style housing ends and 31 spline axles. Optional 35 spline axles and complete center section are available along with a super strong True Trac posi differential with your choice of axle gear ratio.