Dreadnaut
You can fly that YS91 since you've got it, but I don't think you'll be happy on the Intermediate verticals. I upgraded to the Ys110 for that very reason.

Rick
If you already have a header and just need more length (who doesn't ) You can always add a tubing extention between the header and the pipe with an extra coupler. Just look for an aluminum folding chair, walking crutch etc for stock. If you have an aluminum recycling center near you, go by & tell the guy what you're looking for. Take the header with you for size matching. I picked up all I wanted to carry home & gave the guy $5.00 & we were both happy.

Eddie