THE Φ42.7 - 45.0 MODEL FOR HIGH POWER TUNED CARS.
The 42.7mm pipe diameter was chosen from the exhaust port to the collector to retain the stock like response.
(b) COLLECTOR ： Φ45.0
A thicker than normal pipe was chosen to increase durability to handle high horsepower & high boost applications.
(c) TURBO SUPPORT PIPE ： Φ45.0
Guides the exhaust gases more efficiently to maximize the Turbos performance potential.
(d) LEFT BANK
Top priority was given to this section, to be as close to straight as possible.
(e) RIGHT BANK
A larger radial bend to the merging section was decided to minimize heat saturation to the oil sump.
(f) MERGE SECTION
The acute angles allows a smooth extraction of gas flow from each bank.
Exhaust Manifold
Support Pipe
E/G – Exh – Support pipe Gasket
Turbin – Front Pipe Gasket
Support Pipe – Turbine Gasket
Cap Bolt
Flat Washer
Flange Nut
Sutud Bolt
Bandage
Bandage Band
Bolt Smooth Paste
With many exhaust manifolds released so far, we've always designed our headers with Performance, Reliability and quality aspects in mind. Now we have a new model that is compatible with GDB, GRB and GVB. Introducing the highly acclaimed EJ twin scroll EXPREME header. With the very best of the TOMEI exhaust technology, this new design will deliver balanced optimised performance for power, torque and feeling.
PRODUCT INFO
| APPLICATION | P/N | NOTES | |||||
|---|---|---|---|---|---|---|---|
| IMPREZA | JDM | GD-CD | STI | EJ207 | 414001 | For Twin scroll turbo equipped. |
|
| GD-EFG | STI | EJ207 | |||||
| GR/GV | STI | EJ207 | |||||
| WRX STI | VAB | EJ20Y | |||||
FEATURE / SPEC
| TOMEI | STD | ||
|---|---|---|---|
| MATERIAL | SUS304 | – | |
| LAYOUT | 4-2-2 | 4-2-2 | |
| PIPE DIAMETER | PORT EXIT-COLLECTOR | Φ42.7 | Φ42.7 |
| COLLECTOR-SUPPORT PIPE | Φ45.0 | Φ42.7 | |
| SUPPORT PIPE | Φ45.0 | Φ42.7 | |
| PIPE THICKNESS | 2.0mm | 1.5mm | |
| WEIGHT | 9.7kg | 13.1kg | |
■ PIPE DIAMETER & BEND ANGLES
(a) MAIN PIPE ：Φ42.7The 42.7mm pipe diameter was chosen from the exhaust port to the collector to retain the stock like response.
(b) COLLECTOR ： Φ45.0
A thicker than normal pipe was chosen to increase durability to handle high horsepower & high boost applications.
(c) TURBO SUPPORT PIPE ： Φ45.0
Guides the exhaust gases more efficiently to maximize the Turbos performance potential.
(d) LEFT BANK
Top priority was given to this section, to be as close to straight as possible.
(e) RIGHT BANK
A larger radial bend to the merging section was decided to minimize heat saturation to the oil sump.
(f) MERGE SECTION
The acute angles allows a smooth extraction of gas flow from each bank.
■ NON-STEPPED PORT DESIGN
■ REINFORCED FLANGE & LOST WAX COLLECTOR
KIT CONTENTS
DATA
