I don't think CG list the hdi one on their website, it's a call and ask job.
There's a lot of people who have run the helix on big power builds without any issues, that's about as much endorsement as i can give until i get mine on the road.
There's a lot of people who have run the helix on big power builds without any issues, that's about as much endorsement as i can give until i get mine on the road.