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I have the eletronic controlled cut out. I have a 1 ball system, and I tied the cut out to the otherside that I removed the muffler, so it is at the end of the system!! Switch on the lower dash!! On the dyno, it pulled 3 more WHP than my one-ball did!! Loud, yes!! My grandson opens it and drives the local streets. then closes the exhaust and drives back thru..lol Under hard accel... it rips!!
I've run both open header and open mid-pipe (Borla) and it's ******* LOUD.. Sounds like a racecar at WOT from idle-7k lol... A bit loud for everyday driving which is a good thing about the cut-out, not always there.. I say go for it..
Yea, since my donut gasket on my OBX header has failed, I've essentially been driving around with an open header, and even though its REALLY loud, I kind of like how it sounds :-)