Hello People sorry for my Englisch i´m from Berlin Germany

I have a m113k from e55 w211 in my w209 clk black series design

476hp original

i need information

I want to remove catalyst before my right and left

and good software I think of RENNtech
Now the question is sinnvol to mount with a 172mm Renntech pulley? how much power is then bring the pulley? So off before catalyst and good software much pulley with series and how much with 172mm rennetch pulley?
I thank you for your information!
I want nothing else to change in my motor.

THANKS Kai

hy Kai.
172mm crankshaft pulley should reach about 530-570hp at crank.
depends on engine, fuel, length of timing chain, leakage of SC, milage...

I did a CLS55 with 70.000km and a 172mm pulley.
on 95 Octane (E10): 531hp at crank
on 98 Octane: 565hp