BOSTECH REMANUFACTURED FUEL INJECTORS FOR GASOLINE ENGINES High-quality, original manufacturers' units—not aftermarket replacements!Tested to meet and exceed OEM specificationsClean fuel injectors increase MPG For vehicles with gasoline engines Bostech is the nation's leading remanufacturer of superior-quality fuel injectors that look, feel and operate exactly like the originals. Each unit is hand-built by ASE-certified technicians!Please Note: The core charge is noted in the description and included in the price. A coupon is included so you can return the old injector core to Bostech for a refund.