Ford OPF Delete - MG1CS016 - Focus ST, Fiesta ST, Puma ST
Ford ST OPF System
Ford's latest generation ST vehicles come equipped with an Otto Particulate Filter (OPF/GPF) as standard to meet Euro 6d emissions requirements. The Fiesta ST, Focus ST, and Puma ST all have OPF-equipped exhaust systems that restrict exhaust flow and muffle the characteristic EcoBoost exhaust note.
ECU and Model Specifics
- MG1CS016 - Ford Fiesta ST 1.5 EcoBoost 200hp (Mk8, 2018+)
- MG1CS016 - Ford Puma ST 1.5 EcoBoost 200hp (2020+)
- MG1CS015 - Ford Focus ST 2.3 EcoBoost 280hp (Mk4, 2019+)
Why Ford ST Owners Remove the OPF
The OPF on Ford ST vehicles is a significant point of contention in the enthusiast community. The filter muffles the exhaust note considerably compared to the pre-OPF models, creates measurable backpressure that limits peak power, and undergoes regeneration cycles that enrich the fuel mixture and can cause hesitation. For modified cars running Stage 1+ tunes, the OPF becomes a restriction point.
OPF Delete Details
The modification for Ford ST vehicles covers:
- OPF soot accumulation model disabled
- Regeneration enrichment strategy removed
- Differential pressure sensor monitoring off
- Exhaust temperature management recalibrated
- All OPF-specific DTCs masked
- Lambda off typically included in the same package
Performance Impact
Ford ST owners report 8-12hp gains from OPF removal alone, a dramatically improved exhaust note (particularly with aftermarket catback systems), crisper throttle response, elimination of the occasional hesitation during OPF regeneration, and better compatibility with Stage 1 and Stage 2 tuning packages.
The Complete ST Build
A typical Ford ST performance build includes OPF delete, high-flow downpipe, catback exhaust, intercooler upgrade, and ECU Stage 2 tune. The Fiesta ST reaches approximately 250hp, the Puma ST around 260hp, and the Focus ST can exceed 350hp with this configuration.
Ford ST OPF delete and performance solutions at ecuedit.gr. Complete packages available for Fiesta, Focus, and Puma ST.
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