I pushed on the filter itself in my hand to see how sturdy it was before I put it in and it collapsed a bit. I went around the whole rim of the top of the filter and slightly collapsed it before putting it in and the lid on. The top went on with only a little pressure to get the screws in. I slowly tightened each screw until seated fully. I did not want to collapse the filter and cause an crease with a small tear. It is installed now, albeit disfigured a bit, but it works. Those with a faint of heart should wait for the proper Thunderbird fitting...
On a side note: took the bike for a spin and it is much crisper and pulls even harder now. Pretty big difference from the butt dyno. I was going around a corner that I usually go around in full throttle with no problems, this time it was pulling so hard I actually scared myself a bit and had to get off the throttle...no joke. I used to have a slight stumble if I tried to rev very fast from idle and now it just sings. This is a great cheap mod that will be noticed across the powerband. I came home tonight with a big smile on my face and shaking my head in disbelief that this bike just keeps getting better and better. Unbelievable
