Phantom Expansion chamber

[Chainlube]

Not sure if it has been seen/posted so i thought id post it. https://www.ebay.com/itm/135166077874

The CDH expansion chamber is probably the best you can buy off the shelf. You still have to chop off the flange and weld on the stock flange.

Amazon.ca

 

[ImpulseRocket]

That pipe is nowhere near optimal for the Phantom 85. Might make a few tenths more horsepower than just a straight pipe with a straight through muffler on it.