A Planted Technology seat bracket for the Honda CRX, first generation, 1984 to 1987. Part number SB304.
The AF and AS cars. The 1988 to 1989 CRX takes SB173 and the 1990 to 1991 car takes SB167.
The lightest car in this whole range
A first generation CRX is around 800kg. That is genuinely remarkable and it is the entire basis of how the car drives: it is not powerful and it does not need to be.
Which makes the seat choice matter more here than on almost anything else we sell a bracket for. A heavy steel framed shell can be five per cent of the car’s total weight, sitting high and to one side. Ask us about the lighter GRP and composite options and take that conversation seriously.
Space
Two seats, a very short cabin and a low roof. Tell us your height and build before you order anything, because there are shells that will not go in.
Practical
Forty years old and they rust badly. Get right under the carpet before you spend.
Have you written anything about this exact product?
Yes, we have covered this exact product: Lexus Planted Technology Frames Updated For 2026, and Customer Car: Subaru Impreza With Corbeau RRS Seats and Planted Technology Brackets. 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 Honda CRX [1st Generation] (1984-1987). 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.