HKS ER34? (RB25DET) for a muffler

Is for the turbo. JASMA051 G15 / is divided into two semi-stainless. The tailpiece, ER34 according to the four-door, but Aimashita, long intermediate pipe varied. The product line with no intermediate chamber. Has the possibility of artifacts in the shop (better torque and improved muffler?) To meet the current car is a must purchase required. There is also a little rust, is beautiful ~

• Vehicle Model: ER34
• Engine Type: RB25DET