Well this sound goodGINGA said:I had hks 264 12mm lift with standard springs and it seemed to work fine 8)
Pete remember i spoke to Tomei and even they said not to use them as they would bind and wear down the cam just like the standard ones would. Run standard if u want to risk ur engine or wear it down, i dont. If i had more than 1 finger to type with i would list all reasons why u need rite spring and how it is diff from standard one. Its to do with harmonics of the spring as well iirc. It wears stuf more than it is likely to brake and better matched spring less friction better performance in the short.robinsongtir said:Depends who you ask about the tomei valve springs they sell cams that lift as high as 12.5mm that I have and then only spec the valve springs to 11.5mm double springs but I am no convinced they must be good for 12.5mm lift if they are selling cams to cater for 12.5mm lift.