It came in three pieces with bumper and gas rack tubes included boards are part of the side pieces the only thing he has on his web site is the center panel which u have to trim to fit they offer them in 96" and 124" I think I paid 185 plus shipping for the kit the attached photo is from rec motorsports This is the Email I received from Recmotorsports I did not use there Rear suspension Just extension kit
Here is a picture of the Polaris with a 96" longtrack and a Cat with a 124" track.
If you want all of the rail components brackets,rails, wheels, etc add $953.00 to your track price.
If you want tunnel and enclosure ext add $185.00 to the price. Or $1138.00 for both.
Just let me know.