I am in the process of building a twin set up for my PSD. I using a H2E for the primary turbo and need help on the secondary turbo. I have seen the Cummins crowd use the HT3B for it and I was thinking the same for me also. I have been told I might be better off with a HT4B instead though. So,what is difference between them. I am sure the 4B is larger,but what else might make it better than the 3B. Or do y'all think the 3B would be more than enough. Thanks in advance
