Has anyone else with the CorkSport Power Series exhaust experienced a similar problem? I've had the CorkSport exhaust with Racepipe on my 13' Mazda 3 SkyActiv sedan for about two years now and I ended up developing a crack on the weld right after the resonator. It started off very small and...

There is a long black trim strip running either side of the roof covering the weld seam between the roof and side panels. In most places this black trim strip flexes only 1-2 mm when I push on it vertically but it moves 3-4 mm vertically above the front passenger door. The gap between the side...

Ok, ive seen a few reviews of the CS 70a RMM (softest one i could find) and im not sold. Everyone seems to mention that theres alot of vibration at idle, especially with the a/c on. I understand the point of a stiff RMM but why would anyone want that on their mazda 3, a nice comfortable dd? I...