{"product":{"id":10933122236758,"title":"MST Performance Boost Pipe – Ford Focus MK4 ST – 2.3T EcoBoost 2019+ | MST-FO-MK4017","body_html":"\u003ch2\u003eSummary\u003c\/h2\u003e\u003cp\u003eOn 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.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMK4 ST owners replacing the restrictive factory charge pipe\u003c\/li\u003e\n\u003cli\u003eTuned 2.3T builds where boost-side plumbing needs to keep up\u003c\/li\u003e\n\u003cli\u003eHard-pipe consistency through the charge route under sustained boost\u003c\/li\u003e\n\u003cli\u003ePairing with an intake upgrade for the full induction path\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eThe Charge Side Matters Too\u003c\/h2\u003e\u003cp\u003eIntake 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 \u003ca href=\"\/products\/mst-performance-cold-air-intake-system-ford-focus-mk4-st-2014-mst-fo-mk4020\"\u003eMST cold air intake for the MK4 ST\u003c\/a\u003e covers the filter side of the route.\u003c\/p\u003e\u003ch2\u003eKey Specs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eManufacturer: MST Performance\u003c\/li\u003e\n\u003cli\u003eProduct Type: Boost pipe\u003c\/li\u003e\n\u003cli\u003eSKU: MST-FO-MK4017\u003c\/li\u003e\n\u003cli\u003eVehicle Application: Ford Focus MK4 ST 2.3T EcoBoost, 2019 onwards\u003c\/li\u003e\n\u003cli\u003eIncluded Items: Direct replacement boost pipe for the factory part\u003c\/li\u003e\n\u003cli\u003eFitment type: vehicle and engine specific\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment And Setup Checks\u003c\/h2\u003e\u003cp\u003eFor 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.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eMST Performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eBoost pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eMST-FO-MK4017\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle Application\u003c\/td\u003e\n\u003ctd\u003eFord Focus MK4 ST 2.3T EcoBoost, 2019 onwards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Items\u003c\/td\u003e\n\u003ctd\u003eDirect replacement boost pipe for the factory part\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eDo I need this if I already have an intake?\u003c\/h3\u003e\u003cp\u003eThey 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.\u003c\/p\u003e\u003ch3\u003eWill it fit a standard, unmapped ST?\u003c\/h3\u003e\u003cp\u003eYes - it installs as a direct replacement for the factory boost pipe, whether the car is standard or tuned.\u003c\/p\u003e","vendor":"MST Performance","product_type":"Intake Pipework","created_at":"2026-07-03T13:01:27+01:00","handle":"mst-performance-boost-pipe-ford-focus-mk4-st-2-3t-ecoboost-2019-mst-fo-mk4017","updated_at":"2026-08-21T08:21:06+01:00","published_at":"2026-07-03T13:01:27+01:00","template_suffix":null,"published_scope":"global","tags":"brand:mst-performance, cat:air-intake, dept:performance-parts, fits:ford-focus, make:ford, type:intake-pipe","variants":[{"id":54418578669910,"product_id":10933122236758,"title":"Default Title","price":"398.32","sku":"MST-FO-MK4017","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-07-03T13:01:27+01:00","updated_at":"2026-08-21T08:21:06+01:00","taxable":true,"barcode":null,"grams":2000,"image_id":null,"weight":2.0,"weight_unit":"kg","requires_shipping":true,"quantity_rule":{"min":1,"max":null,"increment":1},"price_currency":"GBP","compare_at_price_currency":"","quantity_price_breaks":[]}],"options":[{"id":14003698991446,"product_id":10933122236758,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":82424537121110,"product_id":10933122236758,"position":1,"created_at":"2026-07-14T13:08:36+01:00","updated_at":"2026-07-14T13:08:38+01:00","alt":"MST Performance Boost Pipe – Ford Focus MK4 ST – 2.3T EcoBoost 2019+ | MST-FO-MK4017 | Image 1","width":927,"height":640,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/3e78a3e0-03f4-4ab1-b172-9e2ba587d5b4__97939.jpg?v=1784030918","variant_ids":[]},{"id":82424537153878,"product_id":10933122236758,"position":2,"created_at":"2026-07-14T13:08:36+01:00","updated_at":"2026-07-14T13:08:38+01:00","alt":"MST Performance Boost Pipe – Ford Focus MK4 ST – 2.3T EcoBoost 2019+ | MST-FO-MK4017 | Image 2","width":1800,"height":1400,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/2a36393b-f811-4a9b-a400-406fe443249b__06308.jpg?v=1784030918","variant_ids":[]},{"id":82424537186646,"product_id":10933122236758,"position":3,"created_at":"2026-07-14T13:08:36+01:00","updated_at":"2026-07-14T13:08:38+01:00","alt":"MST Performance Boost Pipe – Ford Focus MK4 ST – 2.3T EcoBoost 2019+ | MST-FO-MK4017 | Image 3","width":640,"height":480,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/0c110fcd-2df3-4ecf-9f88-5ad48bf52b5a__35005.jpg?v=1784030918","variant_ids":[]}],"image":{"id":82424537121110,"product_id":10933122236758,"position":1,"created_at":"2026-07-14T13:08:36+01:00","updated_at":"2026-07-14T13:08:38+01:00","alt":"MST Performance Boost Pipe – Ford Focus MK4 ST – 2.3T EcoBoost 2019+ | MST-FO-MK4017 | Image 1","width":927,"height":640,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/3e78a3e0-03f4-4ab1-b172-9e2ba587d5b4__97939.jpg?v=1784030918","variant_ids":[]}}}