RS4 downpipes with all cats in place - 28.4 lbs for both
RS4 downpipes diameter - 2.61-2.62" for most of the length, with a short tapered section where it mates up to the stock cat back. Here, it is 2.36-2.37".
Rs4 catback as mentioned above is 2.36-2.37". It tapers for bends etc but that’s the diameter of pipe.
I will weigh the catback tomorrow. It’s heavy! I’m submitting a guess of 70lbs.
Also weighed my winter tires that are going on my stock wheels. Bridgestone blizzak in 255.35.19 xl . They are 23.8 lbs each bit are about 30% worn so keep that in mind. Probably around 25each new. Added to stock 19s at 26.8 each should be in the 52 lb range.
Also weighed my winter wheels for the b8 a4. They are Michelin pilot alpin 245.40.18 on stock b8 s4 18" wheels. Each weighed 51.4. These tires are right around 50%.
Thats all for now!