Received my MST Performance exhaust tips today from Taiwan. The quality is very impressive and even the packaging was top-notch! Installation was easy and instructions were clear, although the pictures were a little dark. For the muffler spacers (washers) I used 2 on each side (4 out of 6).
This is a product I'd order all over again, assuming they wear well over time.
https://www.mst-performance.com/products/wms-g4201