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This would be the first mod I'd install on my 13' but i've seen videos on the install for the N55 and how much of a horror story it is. Like a 3-4 hour deal just to get at the damn thing..
Also the GFB for this engine is not at all about the sound, it's about actuating the valve dependent on vacuum and active boost levels, not just having the valve stay 100% open or closed like the stock valve, also I know it's loads stronger, I had one on my 18' GTI
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