https://www.youtube.com/watch?v=IbBg6zuvppQStarted with unmolested Standard/Tourer pipes. I never was happy with the sound, it just didn't work for me on a hot rod bike.
Replace the stock tips with 18" truck stacks, sounded nice but a little raspy.
Added Grumpy's tips, looked great but they raised the pitch and resonated.
Cut the piggies leaving 1-1/2", sounded nice but resonated like hell.
Restored the piggies but increased the diameter to 1", using copper pipe. Deepend the pitch and cleaned up the raspiness, and no resonating. I am extremely pleased with the results.
