IE 1.8T Transverse Intake Manifold

IE 1.8T Transverse Intake Manifold


Item #: IEIMVA1


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performance vw manifoldYou can expect large gains when swapping your factory intake manifold to an Integrated Engineering performance unit. A factory manifold is designed to channel air into the engine sufficiently well to meet the original horsepower targets, while being cost effective and easy to install. This compromise means that there is room for significant improvement. IE manifolds have designed from the bottom up to put performance first. IE engineers exploit careful tuning of the intake manifold runner lengths and diameters to create a resonance effect which rams more air into the cylinders. Each plenum and runner is carefully optimized with computer software for maximum flow in the specific application that it was designed for. Allow your engine to breathe easier and perform at its best with an IE performance intake manifold for VW/Audi transverse 1.8T 20V engines.



performance manifold

power results


made in usa

performance designed

-Tuned for excellent mid range and top end power 
-Optimized bellmouth inlets create maximum power at all RPM ranges
-Modular design allows throttle placement on either driver or passenger side
-Thick wall cast construction for durability
-Choice of machined throttle body flange
-100% engineered, designed, & cast in USA


Included Hardware:
-Plenum to lower manifold gasket
-Plenum to lower manifold install hardware
-Lower manifold runners to cylinder head gasket
-Micro vacuum manifold & vacuum fittings


-1999-2005.5 MK4 VW Golf/jetta with 1.8T engine
-1999-2005 VW Beetle with 1.8T engine*
-2000-2006 MK1 Audi TT with 1.8T engine*
*Fitment may require modification to engine bay

What is the benefit of a modular plenum?
-Two piece manifold can be easily flipped to put throttle flange on either side, easily adaptable to any big turbo setup.

What kind of power gains will I see?
-Power increases are seen in mid-high rpm ranges, depending on turbo setup and displacement.
What else will I need to install?
-Intake manifold now includes our micro vacuum manifold to provide connections for all needed accessories. We also offer a full sized stealth vacuum manifold with more ports if needed for your setup. If using our intake manifold on a small port head, we offer a phenolic transition spacer, which makes the connection between the two without any flow-reducing “steps.”
Will I need tuning for this manifold?
-For maximum performance, tuning is recommended. However, if the factory throttle body is used, it is not absolutely necessary. If upgrading to a larger throttle body, tuning is a must.
How does the IE intake manifold compare to others on the market?
-Our intake manifold shows the best gains in the mid-high rpm range when compared to any of the competing manifolds. By utilizing our micro vacuum manifold, there are no ugly vacuum ports visible on the top of the manifold, regardless of the plenum orientation. We believe this makes our manifold the most visual appealing piece on the market as well as the first manifold available with the modular plenum design. This makes it versatile, as it can be installed with any intercooler piping/throttle body setup. 
I see that the intake manifold is large-port only. Can I use this on my small port 1.8T head?
-Absolutely! You can easily install our manifold on your small port head with use of the IEBAVA16 phenolic transition spacer.
Is it necessary to upgrade my fuel rail to install this manifold?
-Our manifold was designed to work with the factory fuel rail, without modification required. We do offer a high-flow billet fuel rail for higher horsepower applications, which is also visually desirable.
I see that you offer the manifold in raw and black powdercoat finish. Is there a benefit to the black finish?
-The black powdercoat finish is not only visually appealing, but it is much easier to keep clean. Raw cast aluminum parts easily collect dirt that is difficult to remove. The powdercoat finish does not show dirt easily and can be easily cleaned.
How do I know if my cylinder head is small port or large port?
-The cylinder heads are stamped with the three-letter engine code on the front corner, near the #1 cylinder. Only the AEB and AGU engine codes are the large port heads, all other codes are small port and require the IEBAVA16 phenolic transition spacer to be used.


The IE performance 1.8T transverse intake manifold has a feature set which is truly unique. The modular plenum design allows for the entire plenum to disconnect from the runners and flipped in either direction. This allows the throttle body to be installed on either side of the engine bay, the first of its kind on this market. This will allow you to install the manifold with only minor changes regardless of your charge pipe setup for an easy install, on virtually any turbo setup.

direct fit


IE manifolds are cast from a special self aging, self hardening alloy with especially strict requirements for chemical composition. Top of the line Japanese machining centers machine all major surfaces of the parts in one setup, ensuring perfect fit, finish, and maximum value.



This plenum on this manifold has been generously sized and shaped to distribute airflow as evenly as possible to all 4 cylinders. The increased internal volume is a massive improvement over the factory piece and ensures a steady supply of air for the engine.

plenum volume


Featuring aggressively sized runners that have been optimally tuned for large power increases throughout the entire RPM band.  Dramatic power and torque increases come from making small changes to the runner design, our engineers employ CFD software to research and develop an optimized runner and velocity stack designs. Featuring aggressively sized and resonance tuned 48mm inside diameter runners, along with engine specific flow tested velocity stacks this design delivers more air to the cylinder than any other manifold on the market.

runner design


We have carefully engineered and tested this intake manifold in house to get the best results possible in any condition. Due to the unique plenum, velocity stack, and runner design all setups with GT28 or larger turbos will see gains throughout the mid-high RPM range.  During testing performed on our in-house engine dyno, the IE manifold produced excellent power gains through the mid-high range and very little low end power sacrifice with maximum gains of over 90 HP!

increased power


With further careful tuning of the runner resonance tuning, diameter, and length the IE manifold provides an optimal balance of power gains while minimizing loss in spool time and low-end power.  Depending on the engine and turbo setup, the manifold will typically result in very little added turbo lag, especially when compared to other manifolds with similar sized runners and plenums.

fast spool


Unlike other manifolds on the market that are simply welded or cast with larger plenums and made to fit on the car, IE's performance intake manifolds receive special treatment from start to finish. Our engineering department looks at each specific application and designs an intake manifold with a properly sized runner and plenum. Then we begin a series of prototyping and testing countless revisions to the design to ensure optimum performance. Our engineers use Computational Fluid Dynamics (CFD) software to optimize the runner and velocity stack (bellmouth) system for proper resonance tuning and airflow. Unlike competitor manifolds, we use this process on each manifold to design the application-specific runner system to maximize airflow delivery to the cylinders.

Once the manifold has been designed and flow has been optimized, the 3D models head over to our 3D printing studio to manufacture the initial prototype. The 3D printed manifold is fastened onto our in-house engine dynamometer and in-house chassis dynamometer for testing. To validate the plenum, runner, and bellmouth design, we test each revision in a controlled environment. Once all testing data has been collected, it is analyzed and used to determine if changes are necessary before going to production.

fast spool


The Integrated Engineering 1.8T transverse intake manifold has been carefully designed to retain as many of your factory components as possible while delivering industry-leading performance.  Through extensive research and development, this intake manifold fits with little to no modifications to the engine bay, charge piping, vacuum system, or coolant system. The manifold is designed for large port cylinder heads, but will fit all small port cylinder heads with the IE phenolic large port to small port adapter kit (IE part number IEBAVA16, sold separately).

-Audi TT and VW beetle chassis may requires modification to fit, these engine bays have very limited space. Windshield washer fluid reservoir must be relocated and custom intercooler piping may need to be fabricated.

direct fit



For a simple install, this manifold includes the IE micro vacuum manifold at no extra charge. This unobtrusive fitting provides all of the vacuum sources needed without the worry of cluttered lines or ugly plugs on the top of the manifold, installing on the plenum end opposite the throttle body. It can be installed to face downward in either configuration, providing a sleek, and cost effective way to plumb your components requiring a vacuum source.
Micro vacuum manifold