Caldina GT-four exhaust system

[KLsmallboy]

Guys, recently i've been wondering to change which type of exhaust for the Caldina GT-four Turbo. Anyone out there had change exhaust with good performance and sound ? I was introduce the HKS silent but the exhaust looks like the original same kind. Then i read on the n1racing.net they also did show that the Hi-Power from HKS is useable for Caldina GT-four, if so does it affect the air flow issues ?

Thanks if anyone could give more information on this.

 

[kanazai2001]

3" pipe all the way with no muffler...