My stock turbos suffer from the typical cracking on the edges of the manifold for the rear turbo. A while back I heard of a company that was recasting this manifold to use in rebuilds since its getting very hard to find good cores. Anyone have contact information on this vendor?

My car sees a lot of track time on the order of 1500 miles a year. Has anyone found under track use that the conversion to non-sequential slows down the cracking?

 

I do the Rich Mans Non Seq mod which includes welding up the cracks or grinding then out if the porting goes past the crack .