A Planted Technology seat bracket for the Chevrolet Cobalt, 2005 to 2010. Part number SB225.
The Cobalt SS is what this is for, and there were three of them: a supercharged version, then a turbocharged one, and a naturally aspirated middle option. The turbo cars are quick and cheap and have a serious following in American club racing.
The car it shares with
General Motors built the Chevrolet HHR on the same platform, and the HHR SS uses the same turbocharged Ecotec. Different body, different bracket, same running gear, which is useful when you are hunting for mechanical parts.
Why the seat goes early on these
The SS versions came with a limited slip differential and a chassis that will carry real speed, and the standard seat was designed for a cheap compact saloon. That mismatch shows up in the first proper corner. Once a harness goes in it gets worse, because the harness is holding you to a seat that is itself moving.
Practical
Side airbags are fitted, so tell us the specification before anything comes out. Handed, so order twice for a pair.
Have you written anything about this exact product?
Yes, we have covered this exact product: Planted Technology Chevrolet Sub-Frames: Ready For The 2025 Racing Season. That is first-hand coverage from our own builds and showroom, not brochure copy.
Will this fit my car?
This frame is made for the Chevrolet Cobalt (2005-2010). Chassis code and years matter more than the badge, as floor pans change between generations, so if your car sits near a changeover year, send us the registration and we will confirm before you order.
Which seats does it take?
Check the bolt pattern in the specification against your seat. The Compatible seats tab above lists what bolts straight on. If your seat is not listed, tell us what you run and we will confirm the fit.
Do I keep fore-and-aft adjustment?
Only with a sliding runner between the frame and the seat, which is a separate part on Planted frames. If more than one person drives the car, budget for the runner. Our guide to sliding runners explains the options and widths.
Is this for the driver or passenger side?
Both sides are available on this listing, pick driver or passenger side at the point of order (sides listed are for right-hand-drive cars). Left-hand-drive car? Ask us, as the sides swap over and availability varies by model.