Im seeing a lot of posts asking about the best driveshafts on the market. Most reply with HR traxxas or some off brand. MIP are by far superior to HR or plastic alternatives. The metal and machining are on par with the highest quality tool steel. I have a lot of tools and MIP are like the tools your grandpa used... still working. They will outlast your car. Dont use grease, it will act like a cutting compound. Dry lube and locktight. You will need to mod RPM hubs but its extremely easy if you have a dremel tool and a sanding bit. Install the driveshafts, compress your suspension until you see where the axle is hitting the wheel carrier. Use a marker to show where you need to grind, pull it apart and grind away some plastic. Keep doing this till the wheel moves freely when fully compressed. Took me 3 tries per side or about 15 minutes per side.