Code No. 14019-AM002





The key item of exhaust back pressure control with knowhow of HKS CZ200S (CZ4A).
Maximization of performance from stock turbine is the concept of the product.
Extension portion and Front Pipe portion are connected with a flexible joint.
It improves "durability" that is an important factor of tuning.
It offers new tuning possibility for EVO X.




  • As stock turbine is small, it has good response at low rpm. At high rpm, due to exhaust resistance, feeling will be worse. By improved exhaust efficiency, boost pressure will increase earlier at low rpm and power & torque will be increased for whole rpm range up to high rpm.
  • CAD designed complicated but ideal shape is manufactured with lost wax casting. Since lost wax casting items do not have welding portion, there is no problem of cracking by heat and the smooth surface guides exhaust gas flow smoothly.
  • The turbine outlet is 2 ports independent shape for swing valve side and turbine impeller side to reduce resistance due to interference of gas.
  • For street use, connection of extension and Front Pipe is flexible joint type like stock system to reduce vibration and to improve durability.
  • Even lower side exhaust part is hit, it prevents damage to the engine or turbine.



Component Qty
Extension 1
Front pipe 1
Stud Bolt (M10) 1
Flange Nut (M10) 1
Plain Washer (M10) 1
O2 Sensor Bolt 1
Gasket 1
Manual 1



  STD HKS Remark
Volume of extension 3.273 X 105 4.103 X 105 About 25% UP
Inner diameter of outlet φ57 φ59 About 10% UP
Manufacturing method Casting lost wax  
Thickness 4mm 3mm  
Material   SUS304  
Close noise level silent HPmuffler+ metal catalyser (R:93 / L:92dB)  



"Hosepower" & "Torque" increased at entire rpm range!!


Twin port VS Single por

win ports type increase boost pressure level quicker!!

Reduce exhaust back pressure reduces load on engine
and stabilized performance!!



Vehicle Model Engine Model Year Pipe dia. Code No. Manual Remarks
Main Bypass Front
LANCER EVOLUTION X CZ4A 4B11 07/10 -15/09 φ62 φ65 14019-AM002 Make to order item
Available for both SST and 5MT, twin port spec, come with sensor boss.