Hyundai i20N cold start crackles on decel

Hyundai i20N crackles on cold start and decel on down hill, with N-techniks exhaust valve control

[@kynomc5]

Nice sound !! Do you have a gpf suppressor, or just the remote valve control??

[@6040bornholmer]

Just the remote valve control and stock exhaust

[@fifilamalice13]

That sound omg love the crackles ! Do you need to keep a bit of gas to get those crackles?

[@6040bornholmer]

Nope. Just decel down hill at around 40 kph

[@ashcosmo3854]

I have a question.. I have an I20N but it doesn't make these sort of crackles on decel.. is the valve control module telling the engine to dump fuel into the exhaust ? I don't understand how changing the valve control causes crackles on decel ..

[@6040bornholmer]

With the valve control the exhaust valve stays open during decel. Otherwise the valve closes on decel

[@alfiemateee]

how do you do the valve control?? @@6040bornholmer