Amazon or companies that specialize in detailing. I think I may have got mine from Detailed Image when they had a sale. Don't forget the brush. There are specific upholstery brushes.
I concur. I too have both a FL5 and GRC. The GRC is a hoot to drive. Much more mechanical feeling. Reminds me of my old STIs. It has a very different feel than the FL5, which is good because I still appreciate how amazing the FL5 is anytime I drive it. The cargo space is terrible. I ended up...
I have this exhaust and love it. Nice deep, throaty sound. There is definitely drone, but it doesn't bother me one bit. I wish the tips were welded on like the one for the FK8. The benefit is you can place the side tips where you want. I have them sitting back from the center tip.