9ff is a quality product. I worked with the guys from Eurocar Boutique advising them how to market the exhaust.

Moneywise, its only $1,500 more than the Europipe and you do get the switching technology. Remember the Europipe gains tail off badly after 4500 rpm which is why none of the tuners recommend it for high hp applications.

The Europipe does sound nice and has great construction. Also consider the Cargraphic....really the best combo of gains with little resonance.