That depends on what "bad" means to you. The benfits of filled roll resistors on the highway is good enough that you will crap your pants! Especially if you have a CD4E. When you hit the O/D button and accelerate, your car doesn't struggle anymore. If anything the results are the opposite!. It feels as though you are being launched into the car in front of you! 10 times easier to pass cars on the highway or anywhere for that matter! Screw the NVH, this mod is cheap and very effective!
