Our DV+ Diverter Valve Upgrade for your MINI Cooper S with the N14 Turbo engine (2007-2010) produces sharper throttle response, lightning-fast valve actuation, and hold as much boost as you can throw at it. This direct-fit solution couldn't be simpler - keep what works and replace what doesn't.

Fits the following Cooper S models with the N14 engine:

2007-2010 R56 Cooper S Hatchback
2008-2010 R55 Cooper S Clubman
2009-2010 R57 Cooper S Convertible

And the following JCW models with the N14 engine:

2007-2012 R56 JCW Cooper S Hatchback
2008-2012 R55 JCW Cooper S Clubman
2007-2012 R57 JCW Cooper S Convertible

FEATURES

• Uses factory solenoid coil for seamless integration
• Replaces plastic valve parts with metal for reliability and strength on chipped engines
• Direct-fit replacement with TMS benefits
• Exclusive “pilot-actuated” valve mechanism for rapid response at high boost

The solenoid coil itself from the factory-fitted valve is great- the ECU opens it faster than any pneumatic valve so why replace it? Because the weak point in the whole process is the valve mechanism itself. This upgrade solves this problem by replacing the valve parts with an anodized billet aluminum housing, fitted with a brass piston machined to exacting tolerances.

Other manufacturers’ products involve replacing the entire system with a traditional pneumatic valve. In doing so, you’ll need long vacuum hose runs, additional parts for tapping into the intake manifold vacuum, plus a different solenoid valve to actuate the pneumatic valve, or a ballast resistor to plug into the OE wiring loom. All these additional items result in a product that is slower, less responsive, more expensive and takes much longer to install.

That’s why the DV+ Diverter Valve Upgrade solution is so brilliant. More responsive, less expensive, easier to install, and doesn’t cause compressor surge/ turbo flutter. Oh, and it doesn’t require different springs or frequent re-builds either.

The DV+ story: Better performance – more reliable 

Many late-model European cars use ECU controlled solenoid-type diverter valves. This is a good concept because the valve can react very quickly and it only opens when it needs to.

However, there are some problems with these valves;

• The diaphragms are weak and known to rupture, especially if boost has been increased. Once this happens, the valve will no longer hold boost pressure.
• The plastic lip that surrounds the diaphragm is very thin and pieces can break off, potentially ending up going through the turbo.

Additionally, the solenoid on the OE diverter is directly connected to the valve mechanism, which is not ideal because neither it nor the return spring are strong enough to open and close the valve reliably at high boost.

With problems like this, you can see why other aftermarket manufacturers assume the best solution is to replace the factory diverter entirely, or change it to a purely pneumatic system. Unfortunately though, whilst their replacement kits might be stronger than the factory diverter, their slower response speed and lower flow do not justify the extra cost and complexity – more of a compromise than a solution.

DV+ has taken a different approach to deliver a complete solution that solves existing problems and improves performance, without compromise or a hefty price tag. The DV+ addresses the factory valve problems with a very simple and elegant solution. Keeping the factory solenoid, the DV+ retains all the benefits of the stock system. Also replacing the valve parts with indestructible metal components ensures strength and reliability, no matter how much boost you run.

That’s not all; rather than using the solenoid to directly actuate the valve, we’ve introduced a unique “pilot-actuation” system. This means the solenoid only has to control airflow through a small passage that is then used to open and close the piston (rather than opening and closing the piston directly), so it doesn’t matter how much boost you push through it, the DV+ will open and close reliably without ever exceeding the solenoid’s capability.

This feature also improves on the factory system by opening the valve progressively in response to boost pressure, so it only opens as much as required to get the job done (the factory valve simply opens and shuts, it cannot partially open if boost pressure is low), resulting in better throttle response. 

See Mini Cooper N14 Diverter Valve DV+ Installation Instructions.

NOTE: Some states (like California) have ever tightening requirements for emissions testing and inspections. Always check your current state regulations on compliance for street use before you order.

See an informative video about this product:

See installation instructions for DV+ Diverter Valve Upgrade.

The DV+ Diverter Valve Upgrade for your MINI Cooper S Turbo engine produces sharper throttle response, lightning-fast valve actuation, and hold as much boost as you can throw at it. This direct-fit solution couldn't be simpler - keep what works and replace what doesn't. Compatible with both manual and automatic transmissions!

NOT FOR SALE IN CALIFORNIA - We are not able to ship this product to California addresses.

Fits the following Cooper S models with the N18 engine:

2011-2013 R56 MINI Cooper S Hardtop
2011-2014 R55 MINI Cooper S Clubman
2011-2015 R57 MINI Cooper S Convertible
2012-2015 R58 MINI Cooper S Coupe
2012-2015 R59 MINI Cooper S Roadster
2011-2016 R60 MINI Cooper S Countryman
2013-2016 R61 MINI Cooper S Paceman

And JCW models with the N18 engine:

2013 R56 JCW Cooper S Hatchback
2013-2014 R55 JCW Cooper S Clubman
2013-2015 R57 JCW Cooper S Convertible
2013-2015 R58 JCW Cooper S Roadster
2013-2015 R59 JCW Cooper S Coupe
2013-2016 R60 JCW Cooper S Countryman
2013-2016 R61 JCW Cooper S Paceman

DV+ solutions are production year dependent. Select accordingly.

FEATURES

• Uses factory solenoid coil for seamless integration
• Replaces plastic valve parts with metal for reliability and strength on chipped engines
• Direct-fit replacement with TMS benefits
• Exclusive “pilot-actuated” valve mechanism for rapid response at high boost

The T9353 is designed to fit in the tight confines of the Mini N18 engine bay. The T9353 kit splits the DV+ into two parts, the valve, and the solenoid, (which are joined by hoses), meaning the solenoid can be mounted lower in the engine bay out of the way.

Other manufacturers’ products involve replacing the entire system with a traditional pneumatic valve. (i.e. no electronic control). This approach is really a step backwards in technology (a bit like replacing fuel injection with a carburettor) resulting in slower response and effectively removing any control the ECU has over the valve operation.

This DV+ solution on the other hand is more responsive, offers better boost recovery on gearshift, retains ECU control and doesn’t cause compressor surge/ turbo flutter. Oh, and it doesn’t require different springs or frequent rebuilds either. It’s just the way the factory diverter valve SHOULD BE! 

See Mini Cooper N18 Diverter Valve DV+ Installation Instructions.

The DV+ story: Better performance – more reliable 

Many late-model European cars use ECU controlled solenoid-type diverter valves. This is a good concept because the valve can react very quickly and it only opens when it needs to.

However, there are some problems with these valves;

• The diaphragms are weak and known to rupture, especially if boost has been increased. Once this happens, the valve will no longer hold boost pressure.
• The plastic lip that surrounds the diaphragm is very thin and pieces can break off, potentially ending up going through the turbo.

Additionally, the solenoid on the OE diverter is directly connected to the valve mechanism, which is not ideal because neither it nor the return spring are strong enough to open and close the valve reliably at high boost.

With problems like this, you can see why other aftermarket manufacturers assume the best solution is to replace the factory diverter entirely, or change it to a purely pneumatic system. Unfortunately though, whilst their replacement kits might be stronger than the factory diverter, their slower response speed and lower flow do not justify the extra cost and complexity – more of a compromise than a solution.

DV+ has taken a different approach to deliver a complete solution that solves existing problems and improves performance, without compromise or a hefty price tag.

The DV+ addresses the factory valve problems with a very simple and elegant solution. Keeping the factory solenoid, the DV+ retains all the benefits of the stock system. Also replacing the valve parts with indestructible metal components ensures strength and reliability, no matter how much boost you run.

That’s not all; rather than using the solenoid to directly actuate the valve, we’ve introduced a unique “pilot-actuation” system. This means the solenoid only has to control airflow through a small passage that is then used to open and close the piston (rather than opening and closing the piston directly), so it doesn’t matter how much boost you push through it, the DV+ will open and close reliably without ever exceeding the solenoid’s capability.

This feature also improves on the factory system by opening the valve progressively in response to boost pressure, so it only opens as much as required to get the job done (the factory valve simply opens and shuts, it cannot partially open if boost pressure is low), resulting in better throttle response. 

NOTE: Some states (like California) have ever tightening requirements for emissions testing and inspections. Always check your current state regulations on compliance for street use before you order.