A local shop, HMB Motorwerks in Sacramento, installed a KW HAS kit yesterday. Pleased with the HAS but need to go down another 1/2" in front.
DIY'd the SOUL resonated pipes today. The fit, finish and sound of the SOUL are all very good. There's a slight off throttle drone between 1500-2000 RPMs, but not bad at all.
Short revving video...
https://www.youtube.com/watch?v=EU-MRWmUw9k