this is how you really derestrict a cigar, i chopped the header right where it goes into the baffle cover, and welded it on so it becomes an expansion chamber. then i threw that baffle thing in my yard. i had a spare ciao pipe, the baffle box thing on a ciao is the same diameter as the back of the cigar, so i cut off the little steel dome with the pipe coming from the engine going through it,i left about 5 inches of it inside my new espansion chamber. i just welded it onto the back of the puch pipe, it looks like a baseball bat. sounds fuckin mean. i wasn't thinking it would do much performance wise, but i was pleasently surprised, it's like a trashy biturbo, 5 or 6 top end and more low end. on a mostly stock za50 w/14mm bing.
just a little experiment for all those rusted up stock pipes we got kickin around.