M4-2.0 Selectorized Weight Stack Upgrade Kit - 260 lb

Fairly easy to install and the design is straight forward. Still enough room to fit 180lbs of bumper plates on the horns if needed. Also enjoyable that it frees up some room inside with the shorter horns. 130lbs on a 2:1 cable system is enough for almost any 1-handed exercise. Would be nice if they sold an add-on with an additional 4 plates per side, though.

Shipping was fast and product was expected. I have the original M4 not the 2.0 so you have to do some modifications to get this to work. First you need to remove all the plastic guides from each plate, and I have a 3d printer so I just made new ones as the plastic holes are too small. Then you need to buy a pulley and a bolt as they assume you already have it. Then you don’t have to do this but cut the cable and crimp a new end to the cable to make it shorter as it will be too long and will hang. I used a hand hydrolic crimper I already had and it worked like a charm. Not sure why they wouldn’t just sell a kit to let the non 2.0 racks use this as they could make some money on that too. Otherwise it’s a great product with little installation if you have the 2.0 already.

Make sure you have tge M4 2.0 or youll have to do some work to get it to work with your M4 1.0. I have a 3d printer and bought the pulley wheel and bolt from amazon. Also you dont have to but you can cut your cable down and resize it as it will be a little but longer. Otherwise the plates are amazing addon.