HKS GT II Sports Turbine Kit - Subaru Impreza EJ20 - EJ25

Feature

Factory Replacement Type Sports Turbine Kit for SUBARU EJ20/25 Single Scroll Turbine.

Compared to the existing kit 11004-AF010, EJ20 engine is the main target of this kit; therefore, A/R of the exhaust housing is 0.67.

The ball bearing turbine of this kit was originally designed by HKS. Enlarged turbine wheel increases air volume. The ball bearing can reduce response loss. Also, the bypass port was also enlarged to reduce load to the engine and restrict the exhaust pressure increase at high engine rpm.

This turbine kit includes all necessary parts in order to install the kit such as an actuator, oil outlet pipe, etc. (There may be parts necessary to purchase separately, and parts modification is required in order to install this kit.)

Turbine specification

Model

Compressor

Turbine

Trim

Inlet Dia. (mm)

Back Dia. (mm)

Trim

Back Dia. (mm)

Outlet Dia. (mm)

GT II 7460

49.0

52.0

74.0

81.0

60.0

54.0

EJ25 Stock

60.0

46.5

60.0

82.0

53.0

48.0

GT2835

56.0

53.1

71.1

84.0

56.5

51.8

Component

GT II 7460 Turbine

Upgraded Actuator

Oil Piping

Water Piping

Gaskets/Short Parts

Note

Since the turbine scroll is bigger, it comes in contact with the transmission case. Shave the part of transmission where comes in contact with the turbine.

Modification of factory heat insulator and bracket is required to install this kit.

This kit may be able to be installed on GC8 and GDB Type A & B with single scroll turbine. However, we did not test this kit on these models.

TURBINE SPEC

MODEL

Control
device

Compressor Wheel

Compressor Housing

Trim

Inlet Dia.
(mm)

Outlet Dia.
(mm)

Inlet Dia.
(mm)

Outlet Dia.
(mm)

A/R

GT II 7460

Actuator

49

52.0

74.00

EJ only

EJ only

0.82

Turbine Wheel

Exhaust Housing

Trim

O. D.
(mm)

Outlet Dia.
(mm)

Inlet Flange

Outlet Flange

A/R

81

60.0

54.0

EJ single scroll only

EJ only

0.67

Vehicle

Model

Engine

Model Year

Type

Turbine Size

Boost Pressure

Code No.

Price

Remarks

IMPREZA,FORESTER

GC8, GDB(A-B), SG5, SG9

EJ20(TURBO), EJ25(TURBO)

92/10-

GT II SPORTS TURBINE KIT

GT II 7460 49T A/R 0.67

78.5～98.1kPa (0.8～1.0kgf/cm2)

11004-AF011

・For Single Scroll Turbine.