If you like the low end you will want to go with a HX30 or super hx30. The HX35 has a 12cm housing (split scroll) and even the hy35 had a 9cm (non split scroll) but just too laggy. A 14cm would be horrible no matter what compressor it has. Especially at altitude like ours.i prefer low end torque , so I guess I would be better with the 30 or build the H1C with a 14cm housing .. that’s all later in the future or course. Would like to get used to stock power first..