I liked the idea of better IP rated fans and the reports of lower PEM & Motor Temps with the Dual Blower fan which was a warranty upgrade for cars in colder climates and paid upgrade elsewhere. I couldn't source the parts from Tesla because my SC didn't try. This was the "dedicated Roadster SA" as indicated by the new Roadster specific service email them: "If it's not on the upgrade webpage, it's not available. did you want the Battery 3.0? It's the only upgrade still available" me: "It's there, but says 'Sold Out'" them: "Oh, right" me: "Berkeley got me a Roadster car cover, which isn't on the website any longer" them: "Maybe you should talk to Berkeley about these other items" I found the fan and sway-bar on a Canadian parts Roadster posted on TMC. I saw questions on the Eibach part number for the sway-bar and didn't see answers so here it is Removing the bottom panel, you find a mix of rusted (10mm) and stainless (8mm) bolts. Whatever Tesla found at the hardware store? The original fans have a short plastic "plenum" before connecting to the ductwork leading to the PEM & Motor. The new blowers don't have any plenum. The fan lock nuts are 13mm. The sway bar bushings have 10mm bolts and the nuts at the end link are 17mm. These end nuts were very rusted and a PITA to remove. One of the reducers to the ducting is rubber and the other is plastic with 4 studs in between. These need to be removed to install the new fan as there's no room because of the centrally located fan motor. I used an oscillating tool. Make sure you have a blade rated for metal and touch up any scuffs / scratches in the paint as this part of the frame is steel. I'm installing the JdeMO after this. The instructions say to remove the rubber & plastic reducers / manifolds to mount the JdeMO bulkhead and then refit them through the openings in the new bulkhead. I decided to do an install similar to @Stefan T and skipped that by chopping the JdeMO bulkhead into 3 pieces. We'll see if I regret this decision later! The JdeMO parts act as the spacers under the sway-bar bushings so remove those before re-installing. Here's the final install of the fan and sway. The blowers are smaller than the original in size, but because of the design (no plenum) they hang down a little lower so I will need to install some spacers where middle & rear bottom panels attach. This was part of the original upgrade where Tesla used what looked to be high density foam strips.