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  1. Mountain Pass Performance Black Friday 2025 - Our Biggest Ever Sale!

    Hi everyone! We're sliding into the end of 2025 with the biggest Black Friday sale we've ever had! This year we're doing things a little bit differently. The more you buy, the more you save! So if you've been planning on picking up some MPP parts, you won't see discounts like this again for a...
  2. Random Rivian Photos of the Day - Post Yours! 📸

    Haha! We'll take that as a compliment to our lawn management here.
  3. R1S vs. R2 vs. R3 size comparison

    We may be able to take care of that. Waiting patiently for our first R2!
  4. **NEW** MPP "Mega Terra" Forged Wheels

    Hey! We have one set of each color left and another batch in the works in Spain. Let me know if you have any other questions and have a great week.
  5. Where can the aftermarket help the R1T?

    Brake upgrade coming very soon! We'll make a full post once we have it sorted.
  6. *PRE-SALE* on now for MPP Ultra Stainless Steel Brake Lines (R1T / R1S)

    We wanted to come back with a little update for you guys - these are shipping to the pre-order customers! We took some additional photos of the install process on our R1T, and we think they look awesome. The photos show some of the provisions we made to ensure the lines are safe and secure...
  7. Add style points + Protect your door sills! MPP Billet Door Sills for Rivian R1T / R1S

    Thank you so much! This does mean that the door sills should fit the front and rear of the R1S. I'm going to shoot you a DM!
  8. *PRE-SALE* on now for MPP Ultra Stainless Steel Brake Lines (R1T / R1S)

    Yes exactly! Aftermarket brake lines will be slightly different compared to OE lines that use long pre-bend hardlines attached to the banjo fitting, as all aftermarket lines just use standard/short banjo fittings. So the additional bracket is necessary to ensure the brake line goes where we...
  9. *PRE-SALE* on now for MPP Ultra Stainless Steel Brake Lines (R1T / R1S)

    Here's a picture of the line installed at full droop. Because the R1 doesn't have traditional anti-roll bars, the droop will likely be the same whether it's jacked up by one side or lifted on a hoist. We'd have to measure that to confirm 100% as it would depend what the hydraulic anti-roll...
  10. *PRE-SALE* on now for MPP Ultra Stainless Steel Brake Lines (R1T / R1S)

    @R1Thor Couldn't agree more with hating fear mongering tactics and snake oil salesman. It boils our blood and we find ourselves fighting against it regularly!! In this case though, any time a hydraulic hose is strained right out of the fitting it gives us heart attacks. Maybe that's because...
  11. Add style points + Protect your door sills! MPP Billet Door Sills for Rivian R1T / R1S

    If you select "Yes" for Custom Engraved, you can just let us know that you want the MPP logo in the text boxes, and we can make that happen for you. Each one is manually processed, so we can always get in touch. We love that you want an MPP engraved one ? If you can take a measurement of the...
  12. *PRE-SALE* on now for MPP Ultra Stainless Steel Brake Lines (R1T / R1S)

    There is a yellow and a gold option available, but I don't know for sure that either one will exactly match Rivian's yellow. I'll have to talk to them about that ;)
  13. *PRE-SALE* on now for MPP Ultra Stainless Steel Brake Lines (R1T / R1S)

    Just like any other brakes from another vehicle! There's nothing special, and they're easy to bleed.
  14. *PRE-SALE* on now for MPP Ultra Stainless Steel Brake Lines (R1T / R1S)

    We love our R1T so much, and it's been a lot of fun to develop new stuff for. Among our favorites: our new brake lines! We partnered with HEL Performance again (They also help make our Tesla brake lines) to deliver a truly stainless steel brake line - including the fittings and bolts, which are...
  15. Add style points + Protect your door sills! MPP Billet Door Sills for Rivian R1T / R1S

    Just wanted to drop a little update: Moving forward, we've changed the machining and finishing process to be less glossy, as we think the look is so much better!
  16. 2027 Rivian R3X Walkaround by Raiti's Rides

    We are SO excited about the R3X. We want to have one in our possession as early as humanly possible so we can starting tinkering and testing!





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