Customer Car: Honda Civic EP3 With Corbeau Seats
Customer cars, April 2021
We supplied one of our customers with a pair of Corbeau Pro Series X bucket seats for their track prepared Honda Civic EP3: a System 3 in Carbon and Kevlar, and a System 1. The car also has a roll cage and TRS harnesses.
The seats went in on M2 direct fit sub-frames for the EP3, which line up with the Corbeau seats' fixing points. Here is the finished interior and how it all fits together.
- Car: a track prepared Honda Civic EP3
- Seats: a Corbeau Pro Series X System 3 and a Pro Series X System 1
- Frames: M2 Honda Civic EP3 direct fit sub-frames
- Harnesses: TRS
- The car also has a roll cage

The car
This EP3 has been stripped for the track, with a roll cage in the cabin and TRS harnesses on both seats. The painted red shell shows through everywhere the trim used to be.
A car like this changes direction quickly, and a road seat lets you move around once it is loaded up in a corner. With a snug shell and a harness pulled tight, you are no longer holding yourself in place, which makes the car easier to drive hard.

Two versions of the Pro Series X
The Pro Series X is Corbeau’s FIA 8855-1999 competition seat without head protection, so the shell stops at shoulder height and clears a cage more easily than a seat with head wings. It has five harness slots, a HANS zone at the shoulder and a split front leg cushion.
The two seats in this car use different shells. The System 3 is Carbon and Kevlar, the lighter of the two; the System 1 is Kevlar and glass fibre. Both come in the same size, suited to drivers under 6ft with a 32 to 36 inch waist, and an XL version of each exists for a wider hip.
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The M2 frames
The seats sit on M2 direct fit sub-frames for the Civic EP3 and EP2. The frame replaces the factory runners and bolts to the original floor mounting points, with no drilling, and it has 290mm side mount holes that suit the Corbeau seats.
Using frames designed for the car keeps the seat solidly mounted at a sensible height, which matters as much for the harness angles as for comfort.

Garreth’s advice is to choose the seat for your body shape first, then the frame for the car, then plan the harness around the cage. Send us your height and waist size and we will point you at the right shell. Our guide on how to fit a motorsport harness covers the angles and anchor points.
Which seats went into this Honda Civic EP3?
A Corbeau Pro Series X System 3 and a Corbeau Pro Series X System 1, both FIA 8855-1999 bucket seats.
What is the difference between the Corbeau System 1 and System 3?
The System 3 shell is Carbon and Kevlar and lighter; the System 1 is Kevlar and glass fibre.
What frames fit Corbeau seats to a Civic EP3?
This car uses M2 direct fit sub-frames for the EP3 and EP2, which bolt to the factory mounting points and have 290mm side mount holes.
Which harnesses are in the car?
TRS harnesses, used with the roll cage.
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Why it worksFrames made for the car
Corbeau FIA shells on M2 EP3 sub-frames, with no drilling, and TRS harnesses in a caged car.
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