4 x 550cc Top Feed Fuel Injectors - fit Denso If you are looking for top feed injectors for your Mazda MX5 engine these are the best! Fitment details - Overall Length: 75mm - O-ring seat to seat Dimension: 50mm - O-ring centerline to centerline Dimension: 55mm Specifications: - Genuine Part (fit Denso) - Direct fitment to top feed fuel rail - 550cc flow rate at 3 bar - Flow matched 4 piece set - 12 Month Warranty - High Impedance