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Click to enlarge
The NA Sports Feel Has Evolved To An All New Level.
The 1st Version design had the targets of gSharp throttle responseh, gSports engine enjoymenth & gTrue race exhaust soundh. The new version 2 design has all those target aspects met with the additional target of increased power gains. The designs were made and time painstakingly tested both on the engine bench Dyno in a controller environment and on the car in real life uses in the Z Masters race series in Japan. With these tests we found to have excelled in additional performance gains from the previous 1st Version model.
 
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APPLICATION ENGINE PART #
Z33 MT/AT VQ35DE 415001
CPV35 MT/AT
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MATERIAL PIPE
DIAMETER
()
PIPE
THICKNESS
(mm)
WEIGHT
(k)
PIPE FLANGE HEAT SHIELD
SUS304 STEEL SUS304 MAIN 42.7mm
EXIT 60mm
1.5 6.3
(STD
6.8)
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KIT CONTENTS
  Exhaust Manifold
  Heat Shield
  Stick On Heat Insulation
  Insulation Tube
  Tie Wrap
  Engine Side Gasket
  Catalyst Side Gasket
  Heater Pipe Gasket
  Water Pipe O-Ring
  Bolt
  Flange Nut
  Bolt Smooth Paste
  Sticker
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EXHAUST MANIFOLD Ver.2
MSRP $990.00 USD
 
THE MOST POWERFUL ENGINE IN THE Z-MASTER RACE SERIES!!
Click to enlarge
 
 
EXTENSIVE REASEARCH & DELVEOPMENT
 
1. LENGTH COMPARISON TEST
The equal length shows smooth torque results mid rage and the unequal length shows more power up high in the power band. The equal length also delivers a much better race engine sound. The unequal length shows room for power gains up top with more R&D.
 
EQUAL LENGTH PROTOTYPE
Click to enlarge
UNEQUAL LENGTH PROTOTYPE
 
STANDARD LAYOUT EQUAL LENGTH CHOSEN
 

2. OPTIMUM DISTANCE TO MERGE SECTION
The 3 Test Stages of finding the optimum distance to the merge section.

(1) Comparison of 370mm and 620mm
The 620mm length design showed the power band peaked around the 4000 RPM area.

(2) Comparison of 90mm, 240mm and 370mm
The shorter 90mm and 240mm showed the power decrease before the 6000 RPM range.
* From the various test results obtained we decided with the 450mm length which is in between the 370mm~ 620mm area.

(3) Additional tests was done with length ranges between 370mm to 620mm at 400,450. 500 & 550mm sizes to find any extra gains.

@From the additional extensive testing we found the 450mm delivered the best results.
 
EQUAL LENGTH PROTOTYPE 42.7 450mm
Click to enlarge
EQUAL LENGTH PROTOTYPE 620mm
Click to enlarge
 
THE 450mm LONG TYPE WAS CHOSEN
 

3. PIPE DIAMETER & MERGE SECTION
Increasing the exhaust pipe diameter is will increase performance gains but too large will cause power loss. We found after numerous tests that the 42.7mm size made best results.
 
42.7 BENCH DYNO TEST EXHAUSTg
Click to enlarge

42.745.0 BENCH DYNO TEST EXHAUST
 
These test results show how we tested and why we chose the exhaust manifold product designs of equal length 42.7mm L=450mm.
 

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STOCK COMPARISION

With the best layout design there was an additional 0.5kg weight savings gained from our new design.

SPEC
TOMEI
STD
Production Method Pipe Pipe Material TIG Welded Cast
Flange Machine
Material Pipe SUS304 Steel
Flange Steel
Pipe Main Diameter 42.7
Pipe Wall Thickness 1.5mm
Weight 6.3kg 6.8kg
 
THERMAL PROTECTION

With the new performance design layout it is hard to use the thermal bandage to control the heat in the engine bay. So for added performance gains we have also added a heat shield and thermal protector and flexible thermal tube cover. These accessories are all included in the kit and help reduce performance robbing heat.

 
EXHAUST FLOW OPTIMZED
 

For the optimum performance layout the pipe bends are designed to maximize exhaust flow efficiency. The merging section joint angles have all been flow tested and with the smooth pipe layout, performance is maximized with this bolt on kit.

 
THE EXPREME PERFORMANCE
RESPONSE:  
Instant throttle response which delivers a real race engine experience and feel.
TORQUE:  
Improved mid range torque. More torque gives your 3500cc engine more grunt and more fun.
POWER:  
More power in higher RPM range which makes a big difference between the factory settings and our EXPREME upgrade.
SOUND:  
The 1.5mm thin 304 stainless steel will deliver the harmonics of a dry racing sound. The feeling will exceed the famous Ferrari F355.
LIGHT WEIGHT:  
The super lightweight design flange and 1.5mm pipe were adopted for the optimum performance benefits. The end result was a reduction of 9.1kg. (When combined) the lighter weight will affect the cars handling with a lighter front end will make it easier whilst turning.
TRACK BRED
The Z33 350Z will shows its true performance capability when you use the TOMEI EXPREME exhaust manifold & straight front pipe combination.

Copyright (C) 2009 TOMEI POWERD,Inc. All Rights Reserved.
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EXPREMEgbv