used on my 1.8 turbo Audi engine for only around 5 hours. They were running my car with the Emerald ecu at 280bhp and 320bhp but will run up to 500bhp. Im going for 875cc inectors now so these are no longer required. Cost �340 from Jabba Sport, hardly used and over half price at �150. I guess these will fit many other engines other than the Audi. 07855017256