Hey Ferrari just look in the owners manual under "signals" or "headlights" something like that that in the Index its really easy to find... they lay out EVER number you need in there... if im right its 7507 for the turn rear and front... they are the same size! I know the blue looks really nice in person and I think im gonna throw it on the purple PT also! they are brighter IMO also! ... I really like this company they were extremely pleasant to order from... I'm probably gonna order their "fake" hid lighting style today ... the bulbs give a blueish hue to them and are VERY bright but nothing illegal about them