Originally Posted by Strafe1

As Barry stated above, check with your dealer. My dealer OK'd my Kleeman mods, and they indicated Renntech mods are also supported. The MB dealer 50 miles south of me also supports the mods. My service manager has techs on staff that are savvy with these mods and are knowledgeable about safe/compliant mods. So it definitely depends on a qualified service dept.
AMG Dictators example above is too extreme, especially with the NOS, an obvious red flag. Again, time tested and proven mod dealers + qualified service dealer is a must!