Head-off-engine valve spring compressors

my suggestion is by the preform. it will remove any springs. you just might want to upgrade to a roller cam and kit some day and you won't have to stop and buy a better spring compressor. I have the kd one, the air one and still had to buy a large c-clamp one from rbssuperchargers to compress the roller valve springs, this one will remove any spring no matter how much pressure there is.