they bolt straight up...but a31/s13 brakes use the banjo bollts for the brake lines, and skyline/z32 etc calipers use a compression fitting type line...you can still use the banjo bolts though, althoguh it's too long, so if you dont wanna cut the bolt, just use a few more copper washers...just need to do it up tight. it's a good time to upgrade to braided lines for skylines just like i've done