I have for sale or for trade an sr20 rwd block. It is already bored to 87mm and I do not want to bore it any further because the pistons i have are 87mm. It will either need to be bored to 87.5 or sleeved due to some vertical grooves caused by a broken piston ring...block is fine I assure and has been checked by a machine shop. I would be willing to pay shipping on a trade for a block with stock bore if you are going to bore anyway. offers should be texted to 865-604-9443.