The SR20 engine's factory oil block tends to fail due to the weak oil filter sensor screw which often breaks. We here at TOMEI had found the problem during professional racing over a decade ago, so we designed & produced this upgrade oil block which solved the problem. We had later discontinued this product after the end for the N2 series race but due to popular demand, we had to bring it back into production with a new revived design. Now being lighter than before with ports for oil temperature and oil pressure sensors. The failure in the oil block can lead to engine failure so this is an absolute must-have upgrade to protect your investment. Especially with vehicles running a sandwich block or similar the oil cooler can fail at times so you have to take added precautions.