Yep, the stock downpipe on the Golf positions the restrictive catalytic converter right at the turbo exhaust. The aftermarket downpipes not only use a "high flow" or "motorsports" cat, but they move it underneath the car so that it is not smack bang against the turbo. So there is simply a HUGE change in the air flow through the exhaust once you get a competent downpipe installed.
UNFORTUNATELY, the Golf R has that exhaust flap which is meant to make the stock (boring Golf R) more "exciting" when you put your foot down by making a bit more noise etc. In combination with the increase in air flow from the downpipe, yeah, you are going to be LOUD at high rpms and WOT. You've probably also noticed that it's significantly louder on a cold start, until the idle revs drop (~1 minute in Sydney climate).
Whilst I would prefer it not be so loud, there is no way I'd own a Golf R without Stage 2+
Maybe someone will eventually make an aftermarket cat-back which reduces the volume back to non-flap-stock levels or something....
UNFORTUNATELY, the Golf R has that exhaust flap which is meant to make the stock (boring Golf R) more "exciting" when you put your foot down by making a bit more noise etc. In combination with the increase in air flow from the downpipe, yeah, you are going to be LOUD at high rpms and WOT. You've probably also noticed that it's significantly louder on a cold start, until the idle revs drop (~1 minute in Sydney climate).
Whilst I would prefer it not be so loud, there is no way I'd own a Golf R without Stage 2+
Maybe someone will eventually make an aftermarket cat-back which reduces the volume back to non-flap-stock levels or something....
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