When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
They're not really twin pipes. It's a simply "Y" split right at the end. Not true twins all the way back to the manifolds if that's what you're thinking.
A new one went by our buss and i noticed that it was one pipe with a dual tip, but that was the V10. I picked up a magazine yesterday and i saw a picture of the 450 and it looked like it had Dual pipes all the way back. From the picture i couldnt tell if was a Y, it didnt look like it tho it looks sweet.
It's definitely a Y split behind the rear wheel. Take a look at these photos. They clearly show a single pipe to the rear of the vehicle and then the very cool Y splitter at the back.