SRS Performance - The choice for Remapping in Ceredigion, Pembrokeshire, Carmarthenshire.

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Tunit Tuning Modules


SRS Performance is proud to be approved suppliers and installers of Tunit tuning modules for where a remap is not possible. We can supply and fit at your location or supply only.

Diesel Cars, Pick Ups, Vans, Motor Homes

The Advantage 3 is a plug & play vehicle performance module which improves BHP, torque and fuel savings. Our customers see an average of 12% fuel savings with this device installed. This unit is about the size of a mobile phone and comes with a T-shaped harness used when installing. There is a nine position adjustable dial at the top left-hand side of the module (which is external). We send the Advantage 3’s out on number 7, which is based on the performance gains we quote. If the customer wants more power, they can turn the dial-up or alternatively, if they want better MPG, they can turn the dial down.


All Advantage 3’s come with T shaped harness, which installs onto the 3 pin plug located at the end of the common rail. The most time-consuming part of the installation is locating the 3 pin plug. Once the customer has located this plug, it is just the case of plugging in a male & female plug. If the customer’s vehicle is under warranty, they can simply uninstall the Tunit, and there is no trace left on their engine, returning the vehicle back to ‘standard’. This enables the customer to use their Tunit to be reprogrammed in the future. If their Tunit cannot be reprogrammed across, we can instead offer a part exchange to a suitable product.


Price £425 plus vat

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Agriculture (i.e. Tractors, Foragers, Loadalls, Excavators, Diggers)

The A-24 is designed to tackle a range of applications and whatever the day’s work demands. In agriculture, the demand on the engine is broad. Each job presents the engine with its own set of demands. Torque is needed from the off, but also maintaining that torque and power with heavy PTO driven machinery is equally important.
Similar to our Tunit Advantage 3, this unit also comes with a T shaped harness which installs onto the customer’s fuel rail. If the vehicle is under warranty, you can simply uninstall this unit without leaving a trace on the engine.


The A-24 also has a nine position dial, which the customer can adjust to either further improve performance or further improve fuel economy. The A-24 is specific for agriculture because of its improved water resistance and the extra material we include around the harness to ensure outstanding performance no matter what condition the vehicle is being used in. This unit comes with a 5-year product warranty.


Price £465 plus vat

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HGVs / Lorries

The C-24 is unique to HGVs. Similar to our other diesel products, the C-24 is about the size of a mobile phone and comes with a T shaped harness which installs onto the fuel rail.


The C-24 does not come with an adjustable dial due to the product having a closed edge to eliminate any chance of water ingress.


If uninstalled, there is no trace left on the engine, and the vehicle returns to standard power. We quote a fuel saving of 12% with the C-24 installed. This unit comes with a 5-year product warranty.


Price £748 plus vat

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Petrol & Petrol Hybrid Cars

The Tunit Optimum Plus has many benefits and unique features not available elsewhere.

It can be transferred to an endless number of vehicles. Simply move on to your next vehicle and reprogram. Swap to another car in the family, then swap back.


  • It does not overwrite or interfere with the original vehicle programming leaving your vehicle intact and safe. The Optimum can be removed in moments, leaving the vehicle back to standard.
  • It does not remove the engine safety limits set by the manufacturer, meaning no strain to your engine components.
  • Installation is in minutes, not hours, unlike chipping and mapping.
  • Fuel savings along with performance.
  • 2 Year warranty. Tunit is here to support you from upgrades to further enhancement.
  • 2 Year engine & drivetrain warranty


Price £331 plus vat

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