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When we see products such as the BB cat back or the C8 Borlas where they have a pressure or vacuum activated switch for a baffle or bypass, what do we call this part or product? Where can we buy they if we were to consider building our own setup?
I ask because I just saw the price of the BB version like this on sale for still $2100 and thought to myself: heck naw.
I went down this rabbit hole a few months ago:
1) BB Fusions for C5 (NPP-style) are expensive & a PITA to install the vacuum lines (plus some complained of drone).
2) Finding a decent place for cutouts is tough (mid-pipe install misdirects sound & fumes may enter cabin).
3) Vacuum cutouts seem more reliable than electric.
4) An exhaust-bypass with valves at the muffler makes the most sense, but the pictures of this mod "StrangeglovesM6Vert" had posted on CorFor are now missing: https://www.corvetteforum.com/forums...t-cutouts.html
Seems this would be easy on Corsa Extremes, but he did this on Corsa Tourings (I had printed them out, so here they are, so you get the idea):
I was thinking of trying to do what Strangeglove did, but I'm not that good a welder, and wasn't sure I could position my Corsa tips just right afterward. I was planning to use a vac & valves off Amazon, shown here:
And speed engineering has very inexpensive electric flappers... If they die seasonally that would still be ok at just $50. I remember running a pricy kit on a 94 TA GT and it being awesome without fail.
Use the old bypass trick - as in the video above, but use full size tubing. That's the ideal place to put a bypass actuator. When it is not in use you have a standard quiet exhaust. When it is in use, you have an open pipe.
Exhaust Actuators
