MTF bolt in 12-22 mustang tillett seat mounts are the only option on the market currently specifically designed to mount a tillett b5 or b6 screamer xl in a s550! MTF seat mounts are laser cut and cnc bent out of 3/16 aluminum and come powder coated gloss black!
They are adjustable front to back and side to side so you can get the seat exactly where you like it.
With the multiple hole seat mounts they are also adjustable up and down