I've not long bought my disco and i've bought egr blanking kit, a de cat pipe n straight threw exhaust and k & n high air flow kit.on the k&n kits insructions it doesnt show the air flow meter, do i fit the new filter to the air flow meter or can i do away with it? Also will i have to adjust the fuel to air mixture after fitting the new exhaust? Any advise will be appreciated. Cheers