well... im gonna go ahead and say you get what you pay for. not really that the most expensive is the best but... ive got an example. a local shop recently got a kid who brought his single cam civic and an EBAY!!! turbo kit to be installed. well upon first inspection the kit looks pretty decent quality stuff. but after the install and a test drive proved a fault wastegate, leaky oil inlet line, and a bov that didnt even show sign of working. so spend the extra money and get a little more of respectable product...again this is just my .02 cents and it's your decision.