I was having a little trouble finding the right steering hub adapter for my car. I ordered my steering wheel from another company and they sent me a 3508 hub for my 1990 Nissan 240SX with automatic transmission and no cruise control, only it turned out that the aforementioned horn slip ring was too large in diameter. I looked at some pictures on Ebay and noticed that the 3507 has a smaller diameter slip ring so I decided to order it here at Revain to give it a try. Needless to say it got here quicker than expected and fits perfectly. My steering wheel is installed, now the horn works, which makes me very happy :-)