Each restauration project has some parts that can’t be restored to original or are economically unreasonable to restore. In most cases we are talking about the exhaust system. Original systems tend to be bent, dented, rusted and covered with thick soot. Basically, the only option we, pre-1945 NSU owners, have is to buy a reproduction exhaust set. When it comes down to reproduction parts, restores, who are after high originality on their motorcycles, prefer reproductions that are really close to originals. These kind of reproduction parts are usually expensive. But is the most expensive part out there the best and the most similar to the original? Are you able to compare when you don’t own the corresponding original part? That’s the question I tend to ask each time I buy reproduction parts.
This is how I found myself in need of the low-situated exhaust system with later styled exhaust mufflers for my 1937 501 OSL.

On May 25-28, 2023, the 45th Rally of Vintage Motorcycles ROTOR took place. It was the first round of the Polish Vintage Vehicles Championship (“MPPZ”) in the motorcycle category. This year's base of the rally was located in the Waszeta resort near Olsztynek.

When I finished the 44th Rotor Rally last year, I told myself that no one would convince me to start this event again. I was very dissatisfied with the atmosphere at the 44th edition as well as the level of organization itself. At that time, I had a personal impression that the rally was prepared “careless” and "slapdash". As it happens in life, time passes quickly and before I knew it, I was faced with a decision: go to the 45th Rotor Rally or, remembering last year's shortcomings, stay at home? All in all, I didn't need much time to make a decision because my children decided for me that they wanted to go. Each of you knows that a trip with small children on a "vacation / rally event" is not a rest, but hard work where you have to keep your eyes around your head and organize time for your kids all the time so that they don't get bored. For me, going to Rotor is a big logistical undertaking. I have to cover 700 km on national roads with eternal traffic jam and chaos. A small car crammed to the ceiling with luggage and a motorcycle on a trailer dragged mercilessly along the repaired roads. In addition, bored children who do not know what to do with themselves in the car added their "three pennies". All the way I was praying for safe access and a moment of respite, even just during refuelling. Each of you knows that the most pleasant moment is the very end of the journey when you arrive at your destination and feel like a conqueror of unknown places. Masuria, Olsztynek, all these regions are a land out of this world for me. I am used to mountains and hills, so flat terrain and post-German buildings have always fascinated me.