My friend recently messtup his d16 vtec on his del sol and got it replaced by a 1.5 supposingly vtec. But as i have seen some 1.5 vtec they have a Vtec solenoid around the back of the head. Well his head has a spot were there is a triangle shape and 2 holes were screws go in. Inside the triangle there is a empty spot. Is this engine really vtec? Or they screwed my friend?