Milltek Sport has released a carefully optimised sports exhaust system for the Ford Focus ST 2.3 EcoBoost. Specifically, this latest system has been configured for models that leave the factory with Otto or Gasoline Particulate Filters. (OPFs or GPFs)
As a forward thinking manufacturer, Milltek has invested heavily in R&D ahead of the new GPF curve. Knowing that it would soon be legislation, Milltek had previously created a test protocol to allow it to design systems for these vehicles, ensuring that any replacement systems would not only offer the power gains and aural improvements that enthusiasts demand for!
On the latest Mk4 ST, the Hatch and Estate version both share the same floorpan architecture – and therefore, system. However, thanks to the Estate featuring a slightly longer bumper, the exhaust for this car features correspondingly longer tips to ensure a perfect fit.
In either case, the systems are hand-finished from aerospace grade, non-magnetic stainless steel. All bends are mandrel formed to ensure optimum gasflow and the pipework diameter has been carefully chosen at 76.2mm to ensure the perfect balance between ultimate flow and back pressure to allow instant turbo spool up.
Although systems can be tweaked in terms of both noise and aesthetics, thanks to the interchangeability of key parts, all options offer a sporty tone that massively improves the Fast Ford’s factory note, but without inducing unwanted drone or resonance into the cabin at cruising speeds. A wide range of noise levels and trims make it easy for discerning owners to choose the precise system style that they want.
The most basic upgrade is to bypass the GPF itself (where permissible). Beyond this, Milltek also offers either resonated or non-resonated replacements to perfectly tune the note. Either will fit the OEM system – or further Milltek upgrades. Both will require an ECU remap for optimum results. After this, a choice of Race or EC approve systems can be specified, with an attractive array of trim options – all 115mm in diameter. Enthusiasts can choose from Cerakote Black, Polished, Burnt Titanium, Brushed Titanium or Carbon GT115 trims to match or contrast with their car’s bodywork.
In all cases, the Milltek system invariably promises better gasflow, releasing a few extra horses along the way. Whether you’re fitting for looks or performance, this system is an ST essential!
Options and Prices
Non-resonated GPF/OPF bypass to fit to OE and Milltek Sport GPF-back (Requires ECU remap) – From £131
Resonated (fitted with a small silencer) GPF/OPF bypass to fit to OE and Milltek Sport GPF-back (Requires ECU remap) – From £297
GPF/OPF-back – Race (Louder) with a choice of Cerakote black, polished, burnt titanium, brushed titanium and carbon GT115 trims – From £794
GPF/OPF-back – EC-Approved with a choice of Cerakote black, polished, burnt titanium, brushed titanium and carbon GT115 trims – From £927
For more info see Milltek