The muffler was made by:
www.lambertsrc.com
The timing ring that holds the cdi magnet an hub i made myself after i bought my lathe.The timing ring i call it i used a hole saw and cut the middle out of the flywheel and then dressed it up with my lathe and then the hub just screws on.On yours if ya wanted to keep the stock ign ya would just cut the fins flush with flywheel and screw the hub on.Using a cdi makes starting a breeze,ya also get better timing and a little boost in rpms but you only loose about 8 oz average so ya dont loose a lot of weight.You could also gut your stock muffler and put a straight pipe on it.Check in this forum for mufflers,especially by av8tor,he makes his own and ya cant beat em.I just bought a G23 carb adaptor for my toro and it works perfect.ill have to check and see if it works on stihls.Otherwise i would make or modify my own.