Installing Corbeau Sport Seats (Dual Bolt Pattern)
Corbeau base-mounted bucket seats and sport seat recliners have two ways of mounting. We know which frames from which brands fit, but you’ll still need to understand the dual bolt pattern to install them.
The short version
- Corbeau base-mounted seats are drilled for two bolt patterns, 291mm and 345mm wide.
- For Corbeau, Sparco and OMP frames and sliders, use the wide 345mm holes. They are usually covered by the trim.
- Cobra frames use the narrow 291mm holes.
- On 345mm seats, use the Corbeau Motorsport STD handle.
Two bolt patterns on one seat base
All Corbeau base-mounted sport seats come with a dual bolt pattern. One set of bolts is 291mm wide and the other set is 345mm wide. When you receive your new seats and flip them over, you’ll see a set of captive nuts with the M8 bolts already fitted. The pattern you’re looking at is the 291mm narrow installation.
- Bolt pattern 1: 291mm wide (291mm x 330mm)
- Bolt pattern 2: 345mm wide (345mm x 271mm)
When we supply Corbeau seats with fitting frames, in 99% of cases they will not install on the narrow pattern you can see. If you try, the sliding runner handle won’t sit correctly and the bolt points won’t line up as they should.
How to find the wide bolt pattern
Spot the narrow set
Flip the seat over. The captive nuts with the M8 bolts already fitted are the 291mm narrow pattern.
Feel slightly wider
The second pattern is usually covered by fabric because of the way the seats are trimmed. Feel slightly wider than the narrow pattern and you’ll locate the captive nuts you can use for installation.
Offer up your frame
Align the second set of bolt points with your new fitting equipment. The bolt holes line up and the sliding runner handle fits between your rails.
Which holes for which frame?
From testing and experience, we know the 345mm outer bolt points work well with Corbeau, Sparco and OMP fitting frames, and the 291mm inner bolt points work well with Cobra fitting frames. Fitting a Corbeau seat to a Sparco or OMP frame or slider? Use the wider 345mm holes.
| Frame | Use these holes | Pattern |
|---|---|---|
| Corbeau | Outer, wide | 345mm |
| Sparco | Outer, wide | 345 x 271mm |
| OMP | Outer, wide | 345 x 271mm |
| Cobra | Inner, narrow | 291 x 330mm |
Recaro frames use a different pattern again, 405 x 290mm. Our seat bolt patterns guide covers every brand.
Choosing the right slider handle
Which Corbeau handle for 345mm wide seats?
If you’re installing any Corbeau reclining seat using the outboard points, or another brand such as Sparco or OMP using the 345mm wide points, use the Corbeau Motorsport STD handle.
This handle will be marginally too wide, so apply a little pressure to bend it in at point 1, then bend it back out at point 2. That lets the slider sit between the two runners without affecting the mechanism.
Which handle types are available?
If you’re unsure which will be easiest to adjust to your setup, drop us an email or click to open a chat.
Common questions
Why does my Corbeau seat not line up with the frame?
The bolts you can see are the narrow 291mm set, and Sparco, OMP and Corbeau frames need the wide 345mm set. Find the 345mm captive nuts under the trim and the holes line up.
How do I find the second bolt pattern?
It is usually covered by fabric because of the way the seat is trimmed. Feel slightly wider than the narrow pattern and you’ll locate the captive nuts.
Which slider handle do I need for 345mm holes?
The Corbeau Motorsport STD handle. It is marginally too wide, so bend it in a little at point 1 and back out at point 2 so the slider sits between the runners.
Still not sure which holes your seat has?
Questions about fitting a Corbeau seat, or any other seat? Get in touch and we’ll help. You can also ring us on 0115 647 8650.
