Firstly, it is definitely not an MST kit as stated. Secondly, it came with completely the wrong set of screws for assembly some missing and others not fitting at all. With the correct screws purchased assembly was simple and quick. The quality of the product is excellent, no complaints there and it all fitted together as it should. It has completely changed the sound characteristics of the engine as you hear it gulping in the air. No big gains in power as stated but pick up on pulling away is noticeably quicker. So, despite my two complaints this is still a 5 star purchase so far.