Corbeau direct-fit sub-frames for the BMW E21 3-Series. Part code BMWE21.
The E21 was the first 3-Series, built from 1975 to 1983. It covered a range of four and six-cylinder engines including the 323i, and its rear-wheel-drive layout and relative simplicity have made it a long-standing favourite in historic motorsport, classic car sprints and concours events. The 323i in particular attracts owners interested in circuit use: it is light, adjustable, and straightforward to maintain. The original seat offered little lateral support, and replacing it is among the simpler modifications on a car where most things are best left standard.
This is a variable listing, so frame options vary by position and configuration. Check the listing options before ordering to confirm the correct variant for your car. The frames use the original E21 floor mounting points without drilling.
Corbeau-seat-specific bolt pattern. Both driver and passenger positions covered. Price is for one sub-frame set. Seat is not included.
Have you written anything about this exact product?
Yes, we have covered this exact product: How to fit The Cobra Lemans into your BMW E21. That is first-hand coverage from our own builds and showroom, not brochure copy.
Will this fit my car?
This frame is car-specific, so match the vehicle in the product name to your exact car and generation. If you are unsure, 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 Corbeau 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.