ok the air flow on my car is gone car not getting enought power so i went to a shop ask how much it would cost for a new one got qouted £75. wasnt happy so i have checked on ebay and there abt £10-£30 which is alot better BUT heres my question i been looking and theres some 1.6,1.8 ect higher then mine ive asked my mate if i could put higher one in and he said i could it would also make the car faster but is this true?????????