UNEQUAL LENGTH EXHAUST MANIFOLD FR-S / BRZ

 
Unequal length, 4-1
design for torque and response

The FA20 boxer engine inside the Scion FR-S/Subaru BRZ can be said to be the successor to the EJ engine. At Tomei Powered, through our extensive testing, we've produced numerous EJ engine and exhaust parts. By applying our knowledge and experience of EJ engines to the ZN6/ZC6, we conducted even further tests to produce 2 new exhaust manifolds with different characteristics. Using this in conjunction with our new joint pipe, released at the same time, can yield even better results.
 
KIT CONTENTS
EXHAUST MANIFOLD (1)
GASKET (ENGINE SIDE) (2)
GASKET (JOINT PIPE SIDE) (1)
FLANGE BOLT (2)
FLANGE NUT (2)
THERMAL INSULATION SHEET (1)
BOLT SMOOTH PASTE (1)
Includes all gaskets, nuts, bolts etc. required for installation. Thermal insulation sheet also included to protect surrounding components.
 
APPLICATION : SCION FR-S / SUBARU BRZ
PART NUMBER : 412003
MSRP $750.00 (USD)
Designed for Competition Use only
 
 
 
 
SPECIFICATIONS COMPARISON VS STOCK
Unequal length layout for improved torque characteristics.
Improved exhaust efficiency through catless design.
Designed to minimize heat transfer to the oil pan.
   
  ※Joint pipe sold separately
TOMEI UNEQUAL LENGTH  
TOMEI EQUAL LENGTH STOCK
 
MATERIAL
LAYOUT
PIPE
DIAMETER
(Φ)
PIPE
THICKNESS
(mm)
FLANGE
THICKNESS
(mm)
WEIGHT
(kg / lbs)
Port exit
- 1st juncture
Port exit
- 1st juncture
2nd juncture
- joint pipe
Front Rear
STOCK
-
4-2-1
42.7 45.0 51.2 1.5 9.0 10.0 9.2 / 20.28
TOMEI
UNEQUAL
LENGTH
SUS304
4-1
42.7 - 60.5 1.5 12.5 12.5 6.85 / 15.10
TOMEI
EQUAL
LENGTH
SUS304
4-2-1
42.7 45.0 60.5 1.5 12.5 12.5 6.45 / 14.22
 
 
OTHER FEATURES
Lost-wax cast collector.
Complete with o2 sensor boss.
Lightweight, highly rigid stepless flange. Lightweight, highly rigid stepless flange.
 
 
Other exhaust related parts released together for the FR-S/BRZ
EQUAL LENGTH EXHAUST MANIFOLD JOINT PIPE
 
 
 

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