The G56 pipes are a bit (a lot?) quieter, I believe, and I would have gone with those if MMC had not said that any Stage 1 kit rather than their own would invalidate the engine warranty.
There’ll be plenty of G56 pipes to hear, see and maybe try at Treffen this year, so that should answer any questions. I went for G56 as I felt they had the best engineered solution and the best customer service by a mile.
