- The piston is 87mm, that's 1mm larger compared to common 86mm, and the fabric is light-weight and robust A4032 solid aluminum alloy. The specified clearance of 0. We use cookies to ensure that we give you the most effective encounter on our Web page. If you continue on to https://nissan-skyline-rb26-engin60233.frewwebs.com/28794790/the-greatest-guide-to-rb26-engine-sale