Decided black wheels just so common, we will go with the silver finish Enkei XM-6 for more pop. Enkei says the 20x8.5 version is a bit over 24 pounds, other sources say actual weight 23 pounds. Tire choice is Continental DWS ExtremeContract Ultra High Performance All Season (it's still a truck). Going up in tire diameter slightly and width from 245/40/18 to 255/50/20.
Caliper upgrade planned, 6 piston with better bite pads, on the stock rotors for now. Will paint rear calipers to match, final should look something like first picture above.
Or, New Enkei YX-5. Heavier wheel, still save 4 pounds per corner compared to stock package.
The optional for 2021 HPD package wheel. I had been told by our friends at Enkei that they make this wheel and a customer posted pics showing indeed 'ENKEI' top left spoke and '45' offset instead of normal 55mm offset.
Some setups take weeks to get right, this one just needed the helmholtz chamber to dial it right. Helmholtz Resonator is a special side branch resonator that massively reduces the standing wave 'boominess' inside the exhaust system. We went big enough here to cut the 'booming' frequencies of 120-130hz by 48+db which is a common source of complaints with aftermarket exhausts. Will do some driving videos when time permits.
In terms of flow we easily beat the factory setup that starts about 2.4 inches into the first muffler can but keeps shrinking in size from there, exit of factory muffler is pinched down to about 2 inches and the pipe is about 2.125 at that point back to resonator and beyond. In contrast, we are bigger 2.5 inch pipe start to finish and no pinch down points, all mandrel bends, etc. Straight through big Magnaflow muffler at the front of the setup.
Did over 50 miles of mixed driving on it today, it makes me finally use the paddle shifters all the time just for the fun of finally hearing some exhaust note. Will get some driving video done when I can, here is startup. Deeper tone yet mild with no rasp, it is now starting to remind me of the small V8 in my other truck.
Driving sounds clips! First up....boring freeway driving. The point of this one is to show off the benefits of the Helmholtz chamber to quiet it down when just cruising. Will get a canyon road recording another day...