ビレットデファレンシャルブレースキット ― MX-5 NA/NB

Thanks for your review Dylan. As writen in describtion of product bolt holes are pre drilled only and you will have to drill them through in case you want to bolt in the brace while you dont have to drill them for welding (do not forget to drill small vent hole though for hot gas to escape during welding). We decided for this solution as it would be difficult to drill holes in correct location on differential itself so all 3 holes would line up with bolt (front side plate, differential, rear side plate). As this is product where customer can decide if they wants to weld in or bolt it in we just pre drill the hole in correct possition so it is easy for you to drill the rest if you want to bolt it in.If those holes were drilled through by us it would look funny for those who want to weld the brace in.

Hope that clears it.
Thanks again for your purchase!

Andrej