I have just had a recon with lifetime warranty fitted to my BKD Changes noticed police siren gone and wheeziness. It was putting out a lot of smoke when on WOT but this has reduced considerably. In my case the car pulls better. From ECP, no price sorry as I didnt fit myself. Be aware there are two different makes you can get. Onstartup car but out a plum of blue smoke. After turbo fitted still the same, but the car has done 165k