Set of 4 Genuine Toyota Supra Side Feed 550cc Injectors. Tested to support 330rwhp on a stock fuel rail and regulator; 360rwhp with the ATS rail and regulator. Includes new o-rings. These are good, tested, used injectors at this price. New ones are available in the option list for additional cost. We apologize for the extreme price increase. With the weak dollar against a strong yen the cost of these went up drastically.