So here is what all isf owners need for their isf. And so that all know I have an 08 isf. If you are looking to buy Bc Coilovers. Going with swift springs. And make sure to put the 16kg spring in the front and 14 in the rear. It is the best ride ever, and just so you know I didn’t buy my bc coilovers with the swift spring I got it with the regular bc spring but didn’t like the way it ride even tho it was alright, i just wasn’t happy so I upgrade to swift springs. I am only leaving this here so that maybe I can save some of my isf owners some time and money. And before you ask about my damping settings I have the front and rear currently set at 18 click, it rides like a dream. Before the spring upgrade I had the front all the way to 25 clicks and the rear at 20. Hope this will be help full to some of you. Thank you.