Almost all mass-production cars, the Model Y included, ship with rubber brake lines because rubber is durable and cheap. The catch is that rubber hoses expand and contract under hard braking, and that swelling shows up as a spongy pedal, which is really a loss of braking capability you can feel. Swapping to stainless lines removes most of that flex for a firmer, more responsive pedal.
With real reviews from real customers, shop UP products for your Tesla Model S, 3, X, Y and Cybertruck with confidence. Leave reviews and earn up to 2000 UP Rewards points each, redeemable towards exclusive UP Products.