SEMA 2025: New CPP Triangulated Four-Link Rear Suspension Debuts

It’s hard to believe that the first Tri-Five Chevy was introduced over 71 years ago. These ’55-57 Chevys are as popular today as they’ve ever been. There are five (or more) of them as any cruise-in or car show you attend. It is no surprise, then, that companies like Classic Performance Products (CPP) are still churning out fantastic new products for them, like this triangulated four-link rear suspension.

CPP introduced the new triangulated four-link at the 2025 SEMA Show in Las Vegas, and that was far from all. There are new brakes kits for GM A- , F- and X-bodies, and Chevy C10 trucks, all on Corvette-style spindles. CPP shocked the show-goers with full-size 1958-’70 steering arms, which are getting harder and harder to find, plus upgraded ball joints, brake packages, and more. 

“We try to modernize these classic cars. Make them a little safer and at the same time allow you to push them a little harder, and at the same time keep that safety,” said Chris Vargas, Retail Customer Service and Technician for CPP. “These old cars are pretty heavy. A lot of times people want to put a lot of money into the motor. They want to make them go fast, and you know the faster you go, the faster you have to stop.”

Four-link rears are nothing new in the Tri-Five hobby, but usually they are parallel links.

“Not a lot of companies do a triangulated 4-link. I feel this is kind of rare,” Vargas said. “Our kit comes with your mounting brackets here that locate using your existing body mount. It butts up against the existing body mount, and you know there’s only place that goes and get welded in there. We also provide a jig for the brackets that go on the differential.”

The kit comes with double adjustable Viking coilovers that can lower the car 3-4 inches. The bracket also doubles as a sway bar mount. All told, it will keep your Tri-Five plenty flat around corners. 

Reproducing B-body ‘58-70 steering arms was a definite surprise. These hard-to-find parts for GM’s big cars definitely fill a need, and CPP is the first company on the market with them. Best of all, they come with all the hardware to bolt on to stock spindles, and they also work with drop spindles.

On its new ball joints, CPP is changing to flange nuts instead of a cotter pin and castle nut design. This gives you a lot more thread engagement, according to Vargas. 

“We’ve redesigned the ball and socket so it minimizes the friction in the actual movement of the ball joint, so it makes the suspension and steering work a lot more efficiently,” he said.