This is an intake N1 CamShaft for your SR16 or SR20VE. This Cam can pRoduce an increase of 15 hp with Proper tuning And is the perfect Upgrade for tHose with a VVT Engine. Low intake duration = 220 Low intake lift = 8.4 Low intake Center Angle = 110 High intake duration 288 High intake lift = 12.0 High intake Center Angle = 104