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2.5” for the dual out from what I recall

I did mufflers on the sides that had no valves to control the sound to a degree. With this setup it is about 40% louder and still drivable around the city in tour mode, the car also has no resonator which is why I chose to do it that way.

There is nothing online or any literature on it. It took me 2 days to knock it out wasn’t that difficult. Would definitely get some help front will be harder than the rear, I did unmount my front brakes which made it way easier. Also in the front you will need a pass through torque wrench to...

Yes I ending up going with the 10” ones they are solid just a bit of drone here and there.

Yes it will I did the same with my 4, it doesn’t affect the valves at all

Hello! I recently purchased the Swift Lowering springs for my 4 and I am ready to install them just wondering if there anything specific for the install due the active dampening, or if there is any instructions.

It did not set CEL, I think as long as the valves aren’t touched or messed with you should be good.

Much louder compared to stock it feels about 60% louder when the valves are open and the pops are almost like thunder. There is a bit of drone when cruising on the highway and streets but the different of noise in the cabin is relatively the same but from the outside it is crazy.

I recently dropped the muffler on the BW and did an 10” muffler to the straight tips and a straight pipes to the valved tips and it sounds awesome. I saw this on the forum with a 5. It now sounds Much more aggressive and the burbles are consistently there when the valves are open, valves closed...