Integrated Engineering 2.5L 5 Cylinder Intake Manifold Install DIY


Integrated Engineering 2.5L Intake Manifold (IEIMVB1) Installation Guide


In this DIY, we will be covering the installation of Integrated Engineering 2.5L intake manifold and CAI. This kit needs to be installed by a professional or by an experienced technician. Integrated Engineering is not responsible for any damage caused by incorrect installation. Serious engine damage can occur from incorrect installation.  Before you begin,  verify you have the correct tools to  complete the job and unpack and inventory all components on a flat surface and verify that all parts necessary are included.

Tools Needed (Manifold Power Kit):
5 mm ball end allen wrench
5 mm 3/8 ball end socket
6 inch 3/8 extension
3/8 ratchet
6 mm allen ¼ socket
10 mm ¼ socket
13 mm ¼ socket
T25 torx ¼ socket
6 inch ¼ extension
¼ inch ratchet
Needle nose pliers
Regular pliers
Flat blade screwdriver
Phillips screwdriver
8 triple square drive
10 triple square drive
Razor knife

Kit contents (Manifold Power Kit):
(1) Intake manifold
(1) Dipstick tube bracket
(1) 1/8” Barb brass fitting
(1) ¼” Barb brass fitting
(3) 1/8” Brass countersunk plugs
(1) ¼” Brass countersunk plugs
(1) Rubber loop clamp
(4) M6 50mm bolts
(1) M6 20mm bolts
(1) Large O-ring
(5) Small O-rings
(6) M6 12mm bolts
(1) M6 10mm bolt
(1) Meter silicone hose
(2) Cable Ties
(8) M6 25mm bolts


  1. Park your vehicle on a level surface and apply the parking brake.
  2. Start by removing the intake track and air box. Remove the cover that attaches to the front clip. The cover secures by two fingers that clip into the lower half of the housing. Simply lift up on those fingers and remove the cover. The bottom half is removed by pressing the tabs located on the side with a flat blade screw driver. STP_0002 STP_0005
  3. Unclip the MAF, by pressing back on the securing tap. Using a set of pliers, remove the tension from the spring clamp and pull the intake boot off of the MAF. STP_0003 STP_0004
  4. Now remove the air box housing from the engine by gently lifting on the corners of the air box. Some force may need to be taken in order to remove the air box, but be careful not to break it. STP_0006
  5. After the air box has been removed from the top half of the engine, remove the MAF. There are two Phillips screws that secure the MAF to the air box. Remove the screws and pull the MAF housing out of the air box. STP_0010 STP_0011
  6. Remove the intake housing that is connected to the front clip. Remove the T25 torx screws on the right and left side of the housing and take the housing out of the engine compartment. STP_0007 STP_0008
  7. Locate the intake boot that is attached to the throttle body. There are two plastic pipes that attach to the intake boot. Remove those pipes by pressing on the sides of the ends and pulling away from the boot. Release the spring clamp pressure on the throttle body and pull the boot off. STP_0012 STP_0013 STP_0014
  8. Locate the purge valve on top of the intake manifold. Remove the connector by pressing back on the retaining tab. The camshaft position sensor is located on the side of the cylinder head. Remove that connector as well. STP_0015 STP_0017 STP_0016
  9. Locate the rubber hose that connects the purge valve to the throttle body. Loosen the hose clamp on the end of the hose that connects the hose to the throttle body. Remove the hose from the throttle body. STP_0018
  10. Remove the two bolts that secure the engine lifting bracket to the cylinder head. STP_0019
  11. Locate the fuel injector connectors. Remove all five by pressing on the release tab located closest to the cylinder head and pulling upward. After all connectors have been removed, lay the wiring harness so that it is not in the way. STP_0020 STP_0021
  12. Remove the two T25 torx screws that secure the fuel rail onto the intake manifold. Gently wiggle the fuel rail back and forth while lifting up to loosen the fuel injectors from the intake manifold. After the fuel rail has been removed, lay it to the passenger side of the engine compartment. At this point you will also be able to remove the black bracket that runs across the intake manifold that secured the EVAP hose that connected to the throttle body. STP_0022 STP_0023
  13. After the intake manifold has been cleared off, be sure to clean the area that the intake manifold mounts to the cylinder head. This will prevent debris from falling into the intake ports when removed. If using compressed air, be sure to cover the fuel injector ports. STP_0024
  14. Remove the throttle body and MAP sensor electrical connectors located on the intake manifold. Gently pull back on the retaining portion of the connector and slide off. STP_0025 STP_0026
  15. Located under the front of the intake manifold, there are two 8mm triple square bolts. Remove both of these bolts. STP_0027 STP_0028
  16. Remove the nine perimeter bolts that secure the intake manifold to the cylinder head, using your 6mm allen wrench. STP_0029 STP_0030
  17. The dipstick is secured to the intake manifold by a plastic collar. Using a flat tip screwdriver press the collar down on the dipstick tube. Remove the clamp from the right hand side of the intake manifold that secures the vacuum hose to the manifold and pull the vacuum line off. STP_0031 STP_0032 STP_0034 STP_0035
  18. Remove the breather hose from the top of the valve cover by pressing the sides of the connector. STP_0033
  19. Now may remove remove the intake manifold. STP_0036
  20. After the intake manifold has been removed, make sure that none of the green rubber intake manifold gaskets are stuck to the head. Remove those if they are still in place. At this point, also clean the intake surface on the cylinder head. STP_0037 STP_0038 STP_0039
  21. Remove the MAP sensor and the throttle body from the stock intake manifold. STP_0040 STP_0041 STP_0042
  22. Turn your IE 2.5L performance intake manifold over. It is time to install the vacuum fittings and plugs. Each vehicle is different and will use the various fittings supplied. Most vehicles will use only one of the barbed fittings. Decide which fittings best suit your needs. Make sure that when you install these fittings and plugs, you apply a thin layer of Teflon tape or thread sealant. STP_0043 STP_0044 STP_0045
  23. Install the MAP sensor using two of the 12mm long bolts. Install the dipstick tube bracket as well using two 12mm long bolts. STP_0046 STP_0047 STP_0048
  24. Install the five supplied o-rings in the grooves located on the bottom of the runners. STP_0049 *If you are not installing an IE CAI with this manifold, please skip to step 40*


  25. For installing the IE CAI you will need to remove two hoses from the vehicle. First, remove the block breather hose. There are four securing points that mount the plastic hose to the block breather. Gently using a flat tip screwdriver, lift up on each tab while pulling back. You may need to rotate the hose in order to access the lower tab. Once the tabs have been released, pull the hose off of the block breather and remove. INT_0004
  26. The second hose that needs to be removed from the vehicle is the air pump inlet hose. This is the larger of the two hoses located on the air pump. Press the two tabs located on the end of the hose attached to the pump. Pull the hose once the tabs are depressed. INT_0005
  27. Take the large throttle body boot and install the long barbed coupler into the lower breather hose (L shaped hose). Install two of the 20-42 mm clamps onto the hose and then install the block breather hose on the exposed end of the barbed fitting. INT_0001 INT_0002 INT_0003
  28. Install one of the 25-40 mm clamps onto the hose end that connects to the block breather. Install the 32-50 mm hose clamp onto the hose that connects to the air pump. Now install the hoses onto the block breather and the air pump. Tighten each of the clamps. INT_0006 INT_0007 INT_0008
  29. This next step is for those vehicles not using a catch can set up. If you are using a catch can, install the supplied black plug into the last remaining bung on the inlet hose using one of the 20-32 mm clamps. If you are using the factory valve cover install the remaining barbed coupler into the end of the valve cover breather hose. Using the remaining 20-32mm clamps to secure the barbed coupler onto the inlet boot. Now install the large end of the hose onto the valve cover and secure that end using the 32-50 mm hose clamp. INT_0010 INT_0011 INT_0012 INT_0013
  30. Now remove the battery from the vehicle. This step is needed in order to extend the MAF wiring. Remove the top cover of the battery box by pressing the tab and lifting up. Remove the front half of the battery side cover by pressing the release tabs located at the front of the cover on the battery tray. Once those tabs have been pressed, lift up on the cover and remove. INT_0017 INT_0018
  31. Disconnect the battery cables making sure that they do not touch the chassis. Arching and damage will occur if this happens. Remove the battery hold down that is located at the base of the right hand side of the battery. Pull the insulating cover that goes around the battery off.  At this point the battery can be removed from the vehicle. INT_0019 INT_0020 INT_0021 INT_0022 INT_0023
  32. Remove the rear portion of the battery cover. INT_0024
  33. Extending the MAF wiring is a simple process, but extreme caution must be taken when performing this task. Damage will occur to the wiring harness if caution is not taken. With a sharp razor blade, carefully cut the cloth insulating tape from the MAF wiring harness. Cut the tape back all the way to the main wiring harness. INT_0025 INT_0026
  34. After the insulation has been removed from the MAF wiring, be sure to wrap all exposed wiring with electrical tape again. INT_0027
  35. Route the MAF wiring so that it runs around between the battery and the engine compartment fuse block. Re-install the battery and all covers at this time. Make sure that the battery does not pinch the MAF harness when installing the battery back into the vehicle. INT_0028 INT_0029
  36. Remove the bolt at the base of the fuse block. INT_0016
  37. Now install the MAF and spacer on the supplied heat shield. Make sure that the indentations on the spacers are facing the rivet nuts. Orient the MAF so that the connector on the MAF is facing the flat side of the heat shield. Tighten the MAF and spacer to the heat shield using the two 25 mm button head screws. INT_0014-5 INT_0014 INT_0015
  38. Install the heat shield into the vehicle. One of the mounting points is located at the base of the engine compartment fuse block. The other mounting point is located on the front clip where the previous air inlet was mounted. Use the factory T25 torx screw when mounting the heat shield to the front clip, and the factory bolt you removed from the base of the fuse block. Make sure that the MAF wiring harness is ran behind the heat shield. INT_0030 INT_0031
  39. Connect the MAF connector now. INT_0032
  40. Applying blue lock-tite to the threads of the intake manifold perimeter bolts is advised. STP_0050
  41. Place the intake manifold into its corresponding location on the cylinder head. Start the threads of the top bolts using your 5mm allen wrench, but make sure the manifold remains loose. Start with securing the bolt located under cylinder three intake runner. Make sure that the intake manifold does not move much when tightening the bolts, as this could knock one of the o-rings loose. Make sure that all o-rings are in place before securely tightening the manifold to the cylinder head. Tighten bolts to 9 NM 7 FT/LB. STP_0051 STP_0052 STP_0053
  42. Follow the fuel line, EVAP purge valve and vacuum line originally connected to the intake manifold back to their starting location.  The middle hose will have a quick release button with a green press and release tab. Press the green release tab and pull up to remove the line. Once the line has been removed, remove the clamp that secures the rubber hose to that fitting. Use the supplied silicone hose and install the silicone hose onto the fitting and secure it using one of the zip ties. STP_0054 STP_0055 STP_0056 STP_0057 STP_0058
  43. Install the factory quick release fitting back into its original location. Run the new silicone hose to the barbed vacuum fitting located under the intake manifold. Cut the appropriate length of hose and secure the silicone hose to the barbed vacuum fitting with the other zip tie. STP_0059 STP_0060 STP_0061 STP_0062
  44. Tighten the dip stick tube using the loop clamp and 10 mm bolt. STP_0063
  45. Install the fuel rail. Applying a thin coat of grease or using a silicone spray on the lower fuel injector o-rings, will ease the installation of the fuel injectors into the intake manifold.  After the fuel rail is installed on the manifold, secure the rail to the intake manifold using the two remaining 12 mm bolts. STP_0064 STP_0065
  46. Using the razor knife. Cut the tape that secures the fuel injector wiring harness to the fuel injector wire guide. After the tape has been cut off of the guide, remove the plastic guide from the wiring harness. STP_0066 STP_0067
  47. Install the fuel injectors wiring harness so that the injector connectors run under the fuel rail. Connect the camshaft position sensor, fuel injectors and EVAP purge valve connectors at this time. STP_0068 STP_0069
  48. Cut the tape that secures the wiring harness that runs over the throttle body off of the plastic guide. This harness will run over the throttle body. STP_0071
  49. Install the remaining o-ring into the groove in the front of the intake manifold where the throttle body mounts. Slide the throttle body into the intake boot. Be sure not to knock the o-ring out of the groove it is seated in. Using the four 55 mm bolts, tighten the throttle body to the intake manifold. Tighten both intake hose clamps to the throttle boot and MAF. Install the EVAP purge valve hose back on the throttle body and crimp the hose clamp. Now install the IE high flow air filter on the end of the MAF and secure it with the last 70-90 hose clamp. STP_0072 STP_0073
  50. After the installation of your new IE 2.5L high performance intake manifold and CAI are complete, start your vehicle. Verify that there are no vacuum leaks or fuel leaks. Check that all wiring and vacuum hoses are not in the way of any fans or serpentine belt.


Thank you for purchasing another Integrated Engineering product. We are dedicated to serving your VW/Audi engine and performance needs. Please check our website frequently for new product releases. If you have any questions or concerns about this product please do not hesitate to contact us.

Integrated Engineering

6 thoughts on “Integrated Engineering 2.5L 5 Cylinder Intake Manifold Install DIY”

  • We need a video of how the intake sounds.

    • Integrated Engineering October 18, 2013 at 5:43 pm

      Check our Facebook page... we just posted one.

      • Integrated Engineering November 25, 2013 at 12:20 pm

        Hello Darren,
        The torque specs for our 144X19 connecting rods with ARP 2000 rod bolts is 50ft/lbs 3 times. (Torque the bolts to 50ft/lbs then break them loose and re-tighten to 50ft/lbs 3 equal times). Make sure you do this using only the ARP assembly lubricant with a quality torque wrench that has not been dropped.

        Let me know if yo have any other questions!

  • Short video

  • Christopher Scott August 11, 2016 at 2:35 am

    Is this IE 2.5L high performance intake manifold and CAI being installed in the 2010 VW Beetle here, or what car is in these illistrations?
    If so what's the cost?
    And can you send me a link to hear how it sounds?

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