torsion conversion
Just depends on the sled set up. I personally like multi angle helixs and have used about 6 of them over the past 15+ years of riding Cats. I am currently running a 07 M1000 with the 42/38 helix in it now, and also am running a CPC torsion conversion on the secondary. This is the helix they sent me for my set up and its the same as your helix just CPC's not cats. I would recommend the tosion set up from CPC or BDX it is worth the $. Belts cooler and no blowing belts ever since the new set up 5 years now.