I think I may have the V1 setup in my garage. I was able to throw down some record setting runs on my local drag strip running that pipe, but none were recorded as I was running too fast for the class I am in. I have a backorder for the V4 pipe whenever they become available again.
I have a stock exhaust I’m not using and am going to work on a DIY neighbor-hater. The main part of the neighbor hater design is a reciprocating valve that breaks up the airflow, sort of like the intake valve on a pulse jet engine. I think that creates two reverating frequencies (like a dual car horn) to really get the message across.
Bub Rubb and Lil Sis would be proud (“it’s just for decoration”)