If you know a buddy with a decent weilder you can frankenstien them together. Thats what i did. Works great. Just weilded the stock seat rails to the racing seat with a little 1/2 inch square for strenght and voila.
Umm.. only do that if you totally understood what i just said. Otherwise. Get some that fit already, what i did was for a Lambo seats into a Civic.
