Yesterday I got my exhaust finished up. All stainless, mandrel bends and I have 2 options for how quiet it is. Instead of using a traditional y pipe, the exhaust shop recommended a 2 into 1 single chamber muffler tucked up close to the driveshaft in the middle of the car. From there 3" to the back of the car to the traditional location of a muffler where he added another flange. Attached to that flange he made 2 options. The first is just a straight pipe with tip and the second is a 2 chamber muffler with tip. I drove the car home with the straight pipe and although I like the sound, I don't think wide open throttle will pass LimeRock Park's strict noise policy. I'm glad the shop asked about that track and suggested the second muffler option.
I just ordered 2 new O2 sensors from Rock Auto. Once they come in and I get them installed I'll set up a tuning session to see if anything HP wise has been gained by the long tubes.
Anyone want to buy a slightly used Sanderson header full exhaust?