I am doing the ECU, pulley kit and cams but skipping the exhaust. The reason is that $7K for the full system is a little crazy for the minimal gain on the factory AMG system which is preety well designed. When they lower the price to under $3500, I might begin to think about it! Granted that the SLK32 system includes for cats but $7k buys a lot of cats and SS tubing!
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Save money.......
and take off the resonator and replace it with exhaust pipe. It is easy and you can change it back if you don't like the sound. It also decreases back pressure so it surely raises horsepower a little. Two people have done it already and both have liked it. This is on slk32's of course.
I'm considering a renntech exhaust for my 230. They make one with a resonator and another with a sound pipe. Bruce R., which did you get for your 230?
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Matt
2001 Slk 230
Magma Red/Sienna Beige/Charcoal, ///AMG Spoiler, ///AMG Seatbelt Pads, 320 rims, ASP Pulley, Eisenmann high performance twin 83mm exhaust, Bipes MP3 Adapter
Fusian Fas 2003 2nd Place Mercedes-Benz Show Class