Product Name:  
BOV Kompact EM VR8 (Fiat/Abarth)  
BOV Kompact EM VR8 (Fiat/Abarth)  
Product Description:  
Product Number:  
Document Version:  
V1.00 Rev A  
Turbosmart accepts no responsibility whatsoever for incorrect installation of this product which is potentially hazardous and can cause serious  
engine damage or personal injury.  
The EM series BOV is designed for use as a factory replacement for a turbocharger that utilises an electronic diverter valve, this valve can be  
used on other applications as long as there is a control signal to actuate the BOV.  
Ensure the engine is cold prior to installation.  
- Turbosmart recommends that your Blow off valve (BOV) is fitted by an appropriately qualified technician  
Please check that the following items have been provided in your EM Series BOV packaging  
Turbosmart EM Series BOV  
2x Hose clamps  
Main unit  
Mount BOV to inlet and outlet hoses  
1x Blanking plug*  
1x Mount  
Block off second outlet port *(Dual Port Variants only) *  
Fiat 500 Kompact BOV Mount  
2x Allen Bolts  
Allen bolts for mounting Kompact to mount  
Turbosmart sticker  
Turbosmart Sticker  
Figure 1 - Kit Contents  
Hose clamp screwdriver  
Flat bladed screw driver  
Allen Key Set Metric  
Basic Socket set  
Turbosmart has developed a unique “plug and play” diverter valve (or bypass valve) upgrade for your vehicle that is currently equipped  
with an electronic diverter valve. While we have developed this unit to be as simple as possible for you to install, we have not  
compromised on performance. This unit will not leak under elevated boost pressures and will still provide you with rapid response  
ensuring that all the OEM calibration strategies are not interfered with, providing you with maximum boost performance while the  
advanced strategies of the OEM’s are retained.  
The EM series BOV is available in two configurations, Dual Port and Plumb Back. The functionality of the BOV is still the same, there  
is no performance difference between the two units, it is a personal preference if the user wishes to utilise a classic vent to atmosphere  
sound or revert all bypass gasses back into the inlet tract of the turbocharger.  
As the valve is completely controlled by the factory engine control unit, the factory diverter valve is almost silent, due to our  
construction, it is possible that your EM series will be much more audible. By being able to hear the unit actuate, occasionally the  
valve may be opening for a few seconds under the following events such as traction control, cruise control management, rapid  
gearchanges and varying throttle position changes, these are all coded as part of the torque management software in the OEM engine  
control unit, there is no adjustment available over these functions via our product. By hearing these events, it is not abnormal, it is  
completely normal for the EM series BOV to be considered “very active” as it is protecting your turbocharger from surge events or  
bypassing air for torque management purposes.  
Control Signal Plug  
Connect to BOV Control  
Electronic Actuator  
Controls when the valve opens,  
and closes based on OEM  
Vent to Atmosphere Port  
(Only on “Dual Port” Models)  
Vents excess air to  
Plumb Back Port  
Recirculates excess air to  
turbocharger inlet  
Inlet Port  
Boost pressure from the charge pipe  
enters BOV from this port.  
Flange Mounting Holes (Underneath)  
Mounts BOV in a secure location  
Figure 2 - EM Series BOV Overview  
OEM Diverter Valve  
Usually black plastic  
Identify diverter valve location  
Recirculation hose  
Plumbs back into the  
turbo inlet pipe  
The diverter valve will be located on the charge pipe between  
turbo and throttle body, some applications have a hose to mount  
the diverter valve away from the charge pipe linking the plumb  
back hose into the turbocharger inlet pipe.  
Boost Pressure hose  
Connects to the charge  
pipe between turbo and  
throttle body  
On the model designation Type 312 (Above) Abarth 500 the  
Diverter valve is located below the battery. Next to the washer jet  
fill up point. It has been located using the white circle below.  
Removing the OEM diverter valve  
Remove the electronic plug from the OEM diverter valve and  
unscrew any hose clamps and disconnect any hoses, Remove  
the BOV from any brackets, ensure you do not drop the OEM  
valve as permanent damage may occur to the plastic.  
The Yellow Tab must be pulled backwards to unlock the  
mechanism that unlatches the electrical connector from the  
Diverter valve. This yellow tab will be in the unlocked position till  
the Turbosmart valve has been plugged in.  
If the diverter valve cannot be located, seek assistance from your  
local specialist.  
It may be required to remove auxiliary components to  
access the diverter valve, ensure you consult your local  
specialist or a service manual for correct disassembly  
Mounting your EM Series BOV to it’s Mount  
Removing the OEM hose clamps and hoses  
Using the bracket and associated fasteners the BOV bracket  
must be fastened to the bottom of the BOV. This is done with two  
Allen key fasteners that have been included in the packaging.  
Next to remove is the hose clamps from the diverter valve. This  
is done using a screwdriver or appropriately sized socket. If the  
car is fitted with an ear clamp. They can be removed by using a  
flat bladed screwdriver to flick up the locked ear that is located  
on the inner raised ear.  
The hoses can now be persuaded off the diverter valve. Some  
force may be required to dislodge the hoses.  
Mounting your EM Series BOV to the Vehicle  
The BOV can now be mounted to the car using the supplied  
fasteners, making sure to keep the originals in a safe place. As  
seen above. It is important to hold the supplied bolts from below  
to ensure they are not dropped into the engine bay.  
Removing the OEM mounting bolts  
With the hose clamps loose and electrical connector removed.  
The two mounting bolts that hold the OEM diverter in place must  
now be removed ensuring not to drop the bolts.  
Once removed can remove the OEM diverter valve from the  
engine bay and store in a safe place.  
Mounting your EM series BOV to it’s Hoses  
The hoses must now be attached as seen by picture above and  
below, making sure that the hose clamps are on before putting  
the hoses back on! Once on they must be tightened to ensure  
no leaks are present.  
These bolts are not captive and will fall into the engine bay  
if not supported from underneath.  
Congratulations the OEM Diverter valve has been removed.  
Finialising your EM series BOV installation  
Once the valve has been mounted, connect the electrical plug  
into the OEM factory plug and secure the wiring safely away from  
a heat source. Ensuring to push the yellow tab towards the  
connectors to ensure they are locked in  
Congratulations, your EM Series BOV is installed and ready for  
use. Double check all electrical connections and fasteners.  
Remove Your EM series BOV  
Install New Electronic Actuator into your  
EM series BOV  
Remove the electronic plug from the EM series BOV and  
loosen the hose clamps on the inlet and recirculation hoses.  
Remove the BOV from the vehicles  
Ensure the O-rings on your new actuator are correctly seated  
in the grooves before installation  
Cosmetic engine covers may be required to be removed  
prior to the assembly being visible.  
The turbocharger assembly may require the vehicle to be  
raised on a hoist or jacked up and secured using vehicle  
jack stands, ensure your safety is not compromised.  
Remove Electronic Actuator from your EM  
series BOV  
Using a 11mm open end wrench in the flat sides of the  
solenoid, undo the actuator in an anti-clockwise direction  
when viewed from the end. Ensure the wrench is placed on  
Failure to ensure O-rings are seated correctly may lead to  
cutting of an O-Ring and unexpected results from the EM  
series BOV  
Slowly insert the new actuator while turning in a clockwise  
direction to avoid tearing the O-rings  
Ensure the cavity is free from debris using avoiding shifting dirt  
into the passages.  
Tighten the new solenoid into the EM series BOV ensuring the  
wrench is on the metallic portion of the solenoid.  
Tightening the solenoid on the plastic cover may result in  
unrepairable damage to the solenoid.  
BOV not actuating - Confirm electrical signal plug is connected appropriately, as the plugs are new, some force may be  
required to click the plug into place.  
Valve is staying open Confirm the valve has O-rings as they may have been dropped or lost during installation  
Boost pressure loss or lower than before - Confirm the valve has O-rings as they may have been dropped or lost during  
Failing the above, submit a technical request to with information of your engine configuration and  
photos of installation