No, you were right. Two 2" pipes have alot less volume than one 4" pipe. I just used alittle bit of old basic maths to find out he needs two 2.8" pipes to have the same as what he has now.
It's just that maths is pretty had to write and explain on a forum
Therea more too it than just volume like friction losses, turbulence and all that shit in the different sizes of pipe but fook going that far![]()
Pros would be, the twin pipes sound better.
Cons would be the system would be heavier than a single pipe and it's twice the piping you need to make again if you break it or it falls off![]()









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