1) I just have AMS catless LDP noticed drone and vibration is worst in the first 2k-3k miles but smooth out over time. The muffler uses fiberglass packing that needs some wear in. Full catless will always have more drone on VR30.
2) I'm stock height and still think that section towards the back...
Was installed on my Z for 1200 miles. No CEL even with 3in LDP+catback+intakes. Selling to go for full tune with bigger turbos. It’s $375 shipped, located in AZ.
That's the other thing I was going to mention. Stillen uses tuning pro app which doesn't even have an option to receive update through the app. Whereas it is an option for Racechip app as shown.
there’s no way you don’t feel the one wheel peel with an open diff unless you never accelerate past 5k rpm. What’s the point of doing other mods like catback exhaust if you can’t put power down to the ground.
Or the oil pressure control solenoid failed without warning = blown engine. Sonic tuned has talked about this before and mentioned other tuners/master technicians at Nissan/Infinity have encountered the same issue.
Gear ratio is different for auto so look at replacing the diff too. You are also assuming nothing will go wrong messing with the wiring harness? Good luck.