So, I've got a 99WR400F. I love the bike on the trails, even if it's old and heavy by modern bike standards. It's treated me great, and it's just what I'll need for a while to come. Anyways, I'm interested in what the power bomb header has to offer the bike. I'm curious about the following things specifically: 1- Does it make it easier to get to the oil filter? Having to undo the exhaust headers every time seems a bit absurd for something as common as a filter change... 2- Does it actually deliver any noticable benefits to power? Is there anything lost? I'm all about this bikes low end grunt, so if this takes it away in favor of high end, it's not in the cards. 3- Does this require rejetting? Thanks in advance for sharing your experience!