I fitted these to my 00 Civic Si. I have Skunk 2 performance cameras and the original LMAs got louder and ticked badly. I have this aftermarket replacement and WOW. All noise has stopped and the machine runs smoothly. Also, my Vtech is more responsive, at least that's what it looks like from the driver's seat. I also replace my other two sisters with these. Well worth the money and easy to install if you're mechanically inclined and have the right tools to set the valve by word. I would recommend it to anyone who has B series engines.