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I believe it, i had to use camaro extended lug studs to fit my 12 inch wide wheels on the back. Its GM, you know they arent making any novel parts where they can get away with it.

tapout ran my car with the factory exhuast manifolds, headers with green cats, and catless. None added any power on the dyno, and now, 3700 miles later on my catless headers still no check engine light triggered. The sounds is 11/10, and valves are operational if needed.

are you looking for increased supercharger noise?

I have a longer one of me going through the gears under WOT I need to first get on YouTube then will post as well, here are just some driving around. Windows closed. Exhaust on loud mode.

I have their TB, ported SC, smaller pulley, and catless long tube headers and so far 3300 miles in, no codes

a larger TB will not throw codes.

no issue either way, you need to not be in race 1 or 2 and then hold traction until both lights appear. However why stress the brakes when the line lock is so easy to access.

removing the cats does not trigger a code

Stock i was running 9.1-9.3 Post mods consistent 7.8-7.9

Car has 2200 miles. No cats. No CEL, all monitors are set too, no idea what’s going on, I own a shop as one of my businesses and getting a GM to not throw a CEL with any sort of exhaust issue is incredibly demanding, and yet here is my blackwing, no cats, smaller pulley, ported SC, bigger...

If you are already porting the supercharger you might as well get a smaller pulley, the labor is already done. But as mentioned, 2000 miles later full mods, no cats, no check engine

I should have specified, I can’t currently view the parameters as I don’t have the hardware with me and will be away from home for a few weeks. Those videos were also before I had the car fully dialed in, it needed a few small things adjusted after the first 1000 miles of abuse after driving...

Cannot view any parameters.

I would do and dailied my prior 991.1 GT3 with comfort seats, incredibly liveable, both me and my wife who was my girlfriend at the time would take it on road trips or for daily duties. The .2 RS I would do if it had the comfort seats. It has the buckets and being 6,2 they move my head forward...

My C7 Z06 went down on PSI for the same reason after header install, happens every time, you can google “supercharger PSI before and after headers” and tons of threads will pop up. My AMGs did the same, S55 and CL55 showed 2-3PSI lower post headers. Tons of threads on MBWORLD about this, and...

Boost is a measure of resistance, so headers, cam, better flowing heads will reduce measured boost but make more power.

It is purely a sound mod. They don’t add any power. Outside of removing some stress off the supercharger the only benefit is the increase in volumne, and it is night and day inside the cabin, much louder then stock but still live able as a daily. And they are crazy loud from the outside.

compared to like a ZL1?

There was plenty of room inside this former wheel factory.