Get a Milltek turbo-back setup. Seriously it doesn't sound as nice a 6-cylinder car BUT it will rid you of the tractor noise upon start-up. Sad, but it is one of the principal reasons I went for the Milltek setup - to solely rid that "klat-klat" diesel noise. All 1.8Ts do it.
I had a whole bunch of mp3s where someone did a comparison. OEM exhaust, APR exhaust, Milltek Exhaust, Technics etc.. To be more precise, it was the downpipe that changed the start-up noise. I've tried searching for them again on VWVortex but they are gone. Sorry!
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