In stock
Not sure which one? Ask us to confirm fitment first →Send the vehicle, engine and current setup if you want us to confirm the exact application before checkout.
| Manufacturer | MST Performance |
| Product Type | Boost pipe |
| SKU | MST-FO-MK4017 |
| Vehicle Application | Ford Focus MK4 ST 2.3T EcoBoost, 2019 onwards |
| Included Items | Direct replacement boost pipe for the factory part |
On the MK4 Focus ST, the factory boost pipe is a known weak link in an otherwise strong 2.3T EcoBoost package - restrictive by design and plastic where it matters. This MST Performance boost pipe is engineered as a direct high-flow replacement for that factory part, hard pipework carrying charge air with less restriction and holding its shape under boost. For ST owners building the induction side properly, it is the charge-route partner to an intake upgrade. Fits 2.3T EcoBoost MK4 STs from 2019 on.
Intake upgrades get the attention, but everything the turbo compresses still has to travel the boost route. MST engineer this pipe as a direct swap for the restrictive standard part, precision-made from the top-quality components their kits are known for. On a remapped ST running more boost than stock, hard charge-side pipework is exactly the sort of unglamorous upgrade that supports the rest of the build. The matching MST cold air intake for the MK4 ST covers the filter side of the route.
For the MK4-generation Focus ST with the 2.3T EcoBoost, 2019 on. Earlier ST generations and the 1.0/1.5 EcoBoost Focus models use different parts - confirm your generation and engine, and match the part number before ordering.
For UK customers, prices include VAT, customs and delivery unless checkout states otherwise. For customers outside the UK, local customs and taxes remain your responsibility, and shipping is shown at checkout. If a shipping option is not available, email us and we will prepare a tailored quote.
Many of the products we sell are made to order, imported or custom built, so a lead time may apply. If you need a part urgently, contact us before ordering and we will confirm the expected delivery timeframe and process.
They cover different stages: the intake feeds the turbo, the boost pipe carries compressed air after it. Many ST builds run both for a consistent hard-pipe route.
Yes - it installs as a direct replacement for the factory boost pipe, whether the car is standard or tuned.
Use the checked vehicle route, then confirm model year, engine, drivetrain, hardware and existing modifications on the product page or with our team before you commit.
Send us your vehicle, year, current setup and any fitting date, event, trip or deadline before ordering. We will help check fitment, product choice and timing.
