It came with the car. I think it's an autoform. It a bit smaller than another one that came with the car and is homemade. Redsled turned me on to a place to get the material here local. It's a bit heavy but it's strong. Somekind of special wood that treated.
It scrapes going up nearly all driveways. Speedbumps though haven't be much of an problem
Also chucK...I sold out...this car has ABS
I'm going again to the track this wednesday. The car needed to be recorner balanced which is done now and I've put on race pads.
Carl