cutouts
I installed a set of manual ones right after the collector. Its a bit of a pain to reach under and spin off the wing nuts, so I put a spot of weld on the head of each of the bolts so they stay put when attaching and re-attaching the wing nuts making it a little more convenient. Im not sure if there is any more power running the open exhaust though, but the sound of a built 340 with wide open exhaust would even put a twinkle in the pope's eye.