ORIGINAL: Tidnab

If you still have the original canister ,you could drill two 1/2" holes in the top,block off the original exhaust outlet and add 2 stacks to it .If you want a pipe the link above has good parts and John is great to deal with.I bought a manifold and header fron him for my modded 30cc Ryobi /Homelite and made my own muffler.As far as a carb,most say the WA167 with an 11.11 venturi is best for a Homey,but I run a WT 387 on the Ryobi and a WT644 on a modded 25cc full crank Homelite and both perform well ,both with a 12.7 venturi.If your's is stock ,better stick with the WA 167.