Before even going on sale in most parts of the globe, Mercedes’ facelifted SL500 convertible has already come in for a series of modifications from German tuner Carlsson and now has the performance numbers to almost rival its SL63 big brother. The car has also been given a reworked exterior to match the power mods and customers can also opt to have the interior updated as well.

The new CK50 pack from Carlsson lifts output of the standard SL500 (SL550 in North America) to 436hp (325kW) and 600Nm (442lb-ft) of torque – up from 388hp (285kW). This is enough to accelerate the car from 0-100km/h in just 5.1 seconds and take it to a top speed of 293km/h. If this amount of performance doesn’t suffice, Carlsson is currently developing a new kit for the V12-powered SL600 that is expected to output more than 700hp (522kW) and 1,100Nm (811lb-ft) of torque.

Last week, rival tuner Brabus took the covers off its new kit for the facelifted SL range. Its top car is powered by a custom 6.3L V12 engine outputting more than 730hp (537kW) and 1,320Nm (973lb-ft) of torque.