Great pistons for their money,more than great oil seal pistons!!!I have them over 2.2bar boost more than 30.000km...no oil consuption(not even 1gr,i have used them without boost for 8.000km and changed oil first 1000km and then after 5.000km and so on and after programming) just make your workshop to follow Wiseco pistons advices and measures as of their fear they open wider than wiseco advices...i have the 74,5mm oversized