th, everyone ive spoken to that used these gave a post.responce, im using the same type as the"split"ring youve seen on ebay $ 38.95 i didnt buy it there but mine is exactly the same, the kit contains 4 -allen head screws,1- drill coller,1'spit ring seal with spring,and instructions with a template for removing the material from rear engine mount,you can use simple hand tools do this job,gregw, used the dennis welch seal and said it required removing more material from the rear eng. mount then this kit, simlpy put, scewing the collar in each of the crank end bolt holes, drill then tap each hole, install the seal and the aluminum flange with the four allen screws,if you need specs on drill sizes, bolt,sizes, depth of drilling etc. ill be glad to get them to you. keoke? /ubbthreads/images/graemlins/smirk.gif