![mTune SMARTflash m390 Turbocharger Upgrade [Mk4/Mk4.5 Focus ST] Battery Tie Down while maintaining a drone-free experience](https://cdn.shopify.com/s/files/1/0367/2621/files/2746-365_390-AA.png?v=1723138332)
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while maintaining a drone-free experience during cruising and light throttle
a 500g weight saving has been achieved without sacrificing any shift engagement or feel
- tested for turbochargers and catalytic converters
5 Focus ST
It also ensures that if the subframe is removed
mTune SMARTflash m390 Turbocharger Upgrade [Mk4/Mk4.5 Focus ST] Battery Tie Down while maintaining a drone-free experienceThe mountune m390 power upgrade for the Mk4 MK4. 5 Focus ST takes performance and fun to new, elevated levels and is perfect for those wanting to reliably extract peak performance from their 2. 3 litre EcoBoost engine, whilst maintaining drivability and practicality. The m390 is based around a new hybrid turbocharger which starts life as a new genuine Ford turbo, before having numerous flow and performance enhancing upgrades carried out to it, such as
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