HKS Metal Catalyzer Downpipe for Subaru WRX/STI 07-20 TWIN SCROLL

Fits EJ20 Twin Scroll Models ONLY. Will not fit EJ25 Single Scroll Models.

The Metal Catalyzer that has both high output and high purification system.

Use of this products lead to change of boost pressure characteristics. Use of this product with HKS muffler is possible, however use with other manufacturers products and use with altered boost settings may require knocking and maximum boost setting inspection. If necessary please repeat setting.

Extension + FRONT PIPE pipe characteristic (for GRB)

Usually, under higher output, purification performance maybe low. But, HKS catalyzer has both high output capacity and still has high purification performance.

HKS catalyzer is 150 cells which make it less pressure for exhaust air thus produce higher output. Also the thickness of the fin to 0.1mm achieves better heat-resisting property.

Compared to stock catalyzer, both power and torque of mid RPM performance went up and has stable performance even for the high RPM.

* Exhaust gas test certificate is included.

VIP Motorsport is a UK Stockist of HKS. Contact us for a lead time.