I knew they did carbon but I didn't know they did Exhausts.
The carbon I've seen is very nice quality and from looking on their web page the pipe work looks pretty good too.
I don't know if I like the idea of the welded seams on the GP maggot silencer...how would you repack it? Also I can't see a listing for the SP.
Ha! Even they say it's very loud and not for the faint hearted
Up to you Buddy. They do look nice, especially in the black carbon finnish
Pete