Love the cap, make sure you have 4 people to help install, and only thing that bothers me is the glue coming from the window clasps. It will eventually go away, but it’s still a pain in the time being
I installed the boost tubes a few weeks ago and so far I love the difference. It seems throttle and turbos respond much faster. The RPM seem to run quicker as well. I'm happy with the price and performance. It's net very often you get a a quality product for a reasonable price and get the results you were told you would.