I've been welding 35 years. Those welds are ugly. I'm telling people I did it with a coathanger and an extention cord. Seriously,I need a bigger welder.
I love it .. awsome idea . Do you think that you are getting any expansion chamber effect from the back cone ?
Kinda curious since its after the muffler , but I,m thinking you probably get a bit more high end with the long pipe .
Very little power difference, but it does seem to have a sweet spot now where there is much less four-stroking, so it's obviously having some scavenging effect even though the cones are so small. All I know is it sounds much better than the conduit did.