I really cant remember i think they where mahle .5 oversize, They arnt forged so they wernt as strong as the accralite ones but they've lasted for years just skimmed a mm off and fitted them, it depends on what you want out the engine power wise i settled for a bar of boost and it goes well alot more low down torque but then i spose thats down to it being a 2ltr, im having it dyno'd when the managment has been changed and ill post what she done if its still in one piece !!