Handcrafted here in Sydney with mandrel bent 304 grade stainless steel featuring a CNC machined 4-1 merge collector. Our G25 660 kit is designed for street and track applications for people that want a little more exciting power delivery of the G25 whilst still retaining the linear nature of the G30 660. The G25 660 is a super responsive turbo whilst still allowing for great top end power when paired with the FA20. This power delivery also assists with limiting low end torque to ensure driveline longevity when paired with a quality and reputable tune.