Back to Main Tech Support Page
Ask a Question
Technical Questions
Can't find an answer in our Help Center? Submit a question, and we'll get back to you soon.
Need Business/Order Related Support?
Search our Help Center
Get answers to business and order questions from our experienced Customer Service representatives.
Website Feedback
How are we doing? We really are interested in knowing how you feel about DX Engineering. Contact us with your comments - good, bad, great, so-so, or whatever. We want to hear from you!
New at Summit Racing: Speedtech Performance USA Suspension
It’s a great time to own an early Camaro or GM A-body. You can build one as a stock resto, street machine, or Pro Touring ride, power it with practically any engine you want, and not get tetanus pulling 30 and 40 year-old parts out of some junkyard.
If your idea of a hot musclecar tends to the Pro Touring and autocrossing side of town, you’ll want to take a look at Speedtech Performance USA. Speedtech Performance makes some of the nicest suspension components and kits, motor mounts and transmission crossmembers, and parts to make an LS engine swap easier. Summit Racing carries a nice selection of Speedtech Performance components including:
Pro Touring Front Subframes for 1967-69 Camaro
These Pro Touring subframes are designed to be a bolt-in package. The steel subframe is laser-cut and welded on a dedicated jig. That precision means a better fit and much improved suspension performance. At just 125 pounds, the subframe weighs less than the factory part, too.
The Pro Touring subframes also feature:
• Factory-alignment holes make it easier to align the frame to the body
• Built-in Guldstrand modified suspension geometry
• Tubular high-clearance upper control arms and tubular lower control arms
• Viking double adjustable coil-over shocks—allows for up to 2 .5 inches of ride height adjustment
• Upper control arm mounts with additional camber curve adjustability
• Power rack and pinion steering unit with steering arms
• Fully adjustable rear crossmember fits all GM transmissions as well as T-56 and TKO manuals
• Heat-treated tubular 1.25 inch sway bar kit
• Built-in tow/ tie-down hooks eliminate strapping around painted frames
• Mounting hardware, instructions, and custom alignment specs
Pro Touring subframes are available in versions for small block Chevy and GM LS engines.
Rear Suspension Systems for 1964-72 GM A-Body
These suspension systems feature single-adjustable upper and lower control arms with Speedtech’s Articulink technology which allows the arms to rotate laterally while the suspension travels through its full range of motion. This greatly reduces bind and maintains better suspension geometry. Speedtech also uses Delrin bushings that are much firmer than OEM rubber and don’t squeak like urethane bushings do.
The suspension systems also include Viking double adjustable coil-over shocks (with 361 different valving combinations!), a chassis-mount one inch diameter adjustable sway bar, Grade 8 hardware, and instructions.
AFX Front Spindles
The AFX front spindles are designed to correct many of the factory suspension issues found on GM musclecars. The spindles are taller than OE to increase camber and lower ride height approximately one inch. Relocated steering arm mounting points improve Ackerman and bring bump-steer numbers down to nearly zero. The disc brake mount is based on the C5/C6 Corvette design, so you can use factory or aftermarket Vette brakes to really improve stopping power.
Speedtech Performance built in a heavy duty Corvette ZR1 sealed bearing hub that is much stronger than factory and is also maintenance-free. The AFX hubs do not alter the factory track width or bolt pattern so you can use standard-style wheels. The hubs are available for 1964-72 GM A-body, 1967-81 Camaro/Firebird, 1968-74 Nova, and 1978-88 GM G-body.
Adjustable T-56 Transmission Crossmembers for Camaro and Firebird
These crossmembers are designed for stuffing a Tremec T-56 six-speed transmission in any 1967-81 F-body. The crossmembers are fully adjustable fore and aft to accommodate most engine positions and T-56 variants. The smaller diameter tube provides additional clearance for large diameter exhaust systems, and can be removed from the vehicle without disturbing the chassis brackets. The crossmembers are designed for use with a urethane style transmission mount, sold separately.
SEE SPEEDTECH PERFORMANCE PRODUCTS AT SUMMIT RACING