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Individual Throttle Bodies
(ITBs)
November Update: 3rd-Party
Flow test results are now published here
and demonstrate the effectiveness of the Extrudabody Airhorn and streamlined
aero-shaft. We
are now
shipping 40 and 45mm Throttle Bodies, and 45/50 Taper Bore ITBs.
48mm ITBs are in development (50mm is a 2008 product).
Kits start at $545 for
twin-port injection, $895 for a
4 ITB kit, and $1795 for a
v8 kit.
Please see all our prices and order at our
Online
Store. Contact us
directly for a dealer price sheet.
Extrudabody ITBs
are different. The difference is simple, elegant, and better for
many applications and custom installation. In a nutshell, instead of making an ITB that is made to fit a particular
application, we make a Universal ITB. Our competitors either cast their
ITBs or CNC them specific to an application and manifold mounting requirements.
Instead, Extrudabody starts with, guess what, an extrusion. The
extrusion is then machined to match up to all the ITB hardware - throttle
shaft, plate, fuel injector, etc. Our ITB then connects
to one of our Base Plates that adapt the universal ITB design to a bolt pattern
specific to your intake manifold. To the right is an assembled ITB on top
of a Weber-style Base Plate that could replace a DCOE carburetor.
You can also make your own custom base plate
from plate aluminum. Now you probably understand
why our design is so versatile. Instead of changing the whole ITB design for
each and every application, we just change the much simpler Base Plates. This saves us money,
saves you money, and means that you custom guys out there can make
your own base plate with a band saw and a drill press.
 We are the first company to bring this process
to market for ITBs and that's why are prices are the best around.
Extrudabody ITBs on a Datsun 280Z:
Modular Approach:
- Base Plates (at top of pic below) are available to adapt our ITBs
to the most common
carburetor manifolds - SU, Weber DCOE, IDA, and IDF.
- Extensions (middle of picture) are available in 2 lengths to
enable tuning of total intake length
and fuel injector placement.
Extensions can either be placed between ITB and Base Plate, or
between ITB
and Air Horn to effectively create a longer Air Horn
- Spigot Adapters (leftmost) will be available soon to link ITBs to
custom manifolds or cold-air intakes
Key Features for ITB-3850:
- Stainless steel shaft, bearings, and bolts for durability and strength in
the most corrosive environments
- Aero Split Shafts are designed to maximize air flow and increase strength
for racing applications and protection from backfire damage to shafts.
These Shafts are made from 8mm stock, but only have a 6mm cross section with
throttle plate open to maximize flow while maintaining strength.
- Check our air flow comparison video over in the
Videos and Installations section showing how our air horns
and ITBs flow great compared to a conventional design.
- Throttle shaft ball bearings (not just bushings) with high temp Viton
seals to maximize throttle pedal feel
and minimize binding. Our stainless steel bearings should far outlast brass bushings
used in many throttle bodies.
Specifications (ITB-3850):
- Material: Heat treated 6063 aluminum (T6 hardness), anodized for
durability
- Throttle Shaft: Stainless steel, split shaft to maximum
strength and air flow
- Throttle Plate: Anodized 6061 aluminum
- Shaft Bearings: Stainless steel sealed bearings with high
temperature Viton seals
- Click here to explore a 3D CAD view of an ITB (Adobe Acrobat 7 or higher required)
and here to see a Porsche
911 setup
- Bore size of 40mm, 45mm or 45/50mm taper bore
- 45mm CFM: 292 with air horn
- 40mm CFM: 216 with air horn (see
Flow Test Results)
Diagram of Key Features:
Plenum-Building Parts are In Development:
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