METAL CATALYZER LEGACY TOURING WAGON Explanation of the product Application chart

Code No. 33005-AF005





The Metal Catalyzer that has both high output and high purification system.
New Legacy B4/Legacy Touring Wagon (BL5/BP5) AT



  • A Metal Catalyzer to give more to the Legacy tuning. It's a combined unit type of Front Pipe with 150 cell catalyzer.
  • There are for both 5MT and 4AT. We have received public organization's certificate of 10-15 mode exhaust gas test for both.
  • We have set bypass pipe for extension part to prevent the exhaust gas turbulence and also we have redesigned spherical surface gasket and increased pipe diameter for muffler connection part.
  • These will prevent knocking of EJ20 tuning and lower the secondary exhaust pressure after turbine and primary exhaust pressure before turbine and improve the intake efficiency.



■Comparison of stock catalyzer and HKS Metal Catalyzer ouput  

■Comparison of stock catalyzer and HKS catalyzer exhaust pressure


* Above graphs are only for MT and Racing Suction combined. Please adjust fuel for Racing Suction combined.


Test vehicle specification
Legacy B4 (TA-BL5)5MT
●Metal Catalyzer 33005-AF006
●Silent High Power (main + mid) 31019-AF013
●Super Fire Racing S40iL 50003-S40IL
●Racing Suction Kit 70008-AF005



Other parts
Part Quantity Size
Turbo outlet gasket 1  
Spherical surface gasket 1 φ65



* 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.


Vehicle Model Engine Model Year Pipe Size Code No. Price Remarks
LEGACY TOURING WAGON TA-BP5(A, B, C) EJ20X 03/05-06/05 φ70x2-φ75-φ65 33005-AF005 For 5AT. Front pipe included.