280° cams to suit 3S-GTE racing engines with turbo sizing 58-64mm+ making 700hp+. Suitable for drag racing, roll racing and track cars. Good increase in high rpm power. Great with E85. Kelford Cams recommend KVS109-3S valve spring. The intake camshaft has been machined to fit the OEM Gen4 intake trigger. These cams can be used in Gen3 engines but will require the supplied grub screw to be fitted to the rear of the intake cam.