Hello dear fan community, I am currently looking intensively for 560sec`lern and am close to getting one. I am now quite familiar with the weaknesses and different types, now only a general question to understand: In the new model generation from 1986 there was a subsequent performance increase of the 5.6 litre moror to 279hp or 300hp (without cat). At the moment I am on a really perfectly standing model from 1986 from first hand. This was original I have a RÜF with a registered 272hp, the cat has been retrofitted one or two years after EZ by Mercedes. Is it possible to destroy the engine without him fundamental and without inserting 1000€ to get this engine also the power from 1987… it also brings something just to clamp off the cat ( in ppar years it is anyway oldtimer). Thank you already in advance. LG Klaus PS: I know the SEC is not a racing car etc, I’m concerned about minor changes about the performance of only after 19 ==References==