The Ford Fiesta is one of the most-modified cars in the country, and whether you are running an ST, a Zetec S or keeping a tidy standard car on the road for years to come, the original rubber hoses are a known weak point that is well worth addressing. Heat, age and pressure cycling slowly harden the factory rubber until it perishes and splits, often at the worst possible moment. Switching to silicone gives you a hose that handles far more heat, holds its shape under pressure and very realistically outlasts the car itself. These are the upgrades we would prioritise, in the order we would fit them.
1. Coolant hose kit
If you only do one thing, do this one. Our Fiesta ST150 MK6 coolant hose kit is a direct-fit, vehicle-specific set that replaces the tired rubber radiator and heater hoses in a single job. Every hose in the kit is pre-shaped to match the original moulded parts, so it drops straight into place with no cutting and no guesswork, and because you are refreshing the whole cooling system's weakest links at once you remove a whole cluster of future failure points in one afternoon. It is the single highest-value upgrade on the list.
2. Induction hose kit
For Zetec S models, the MK6 silicone induction hose kit replaces the soft moulded intake hose with reinforced silicone that will not soften, balloon or collapse under load. As well as improving the integrity of the intake tract, it tidies up the engine bay considerably, which matters if you take any pride in how the car looks under the bonnet.
3. Air filter induction kit
If you want to improve breathing at the same time, the Fiesta MK6 silicone air filter induction kit pairs the silicone intake with a performance air filter for a cleaner, freer-flowing setup and a noticeably sharper induction note. It is a popular next step once the cooling and intake hoses are sorted, and it builds naturally on the induction hose kit above.
4. Don't forget the clamps
Finishing the job properly means using the right clamps in the right places. For the coolant joints, quality worm-drive clips are perfectly adequate and easy to fit, while on the induction side it is worth stepping up to T-bolt clamps for a stronger, neater and more even hold that copes with the demands of the intake. If you are not sure which clamp belongs where, our clamp guide walks you through it.
Got a different car?
The Fiesta is just one of many vehicles we cover. We manufacture vehicle-specific silicone hose kits for a wide range of popular models, from the Mazda MX-5 and MINI Cooper S through to the Land Rover Defender, all pre-shaped for a direct fit. Browse the full Ford range, or explore every vehicle-specific hose kit →
Frequently asked questions
Q: Which silicone hoses fit the Ford Fiesta ST?
A: We make vehicle-specific coolant and induction hose kits pre-shaped for a direct fit on the Fiesta ST - no trimming or modification needed.
Q: Are silicone hose upgrades worth it on a Fiesta ST?
A: Yes - they handle the extra heat of a tuned engine, resist ballooning under boost, last far longer than rubber and tidy up the engine bay.
Q: Do the kits come with clamps?
A: Kits include the hoses; we recommend pairing them with worm-drive clips on coolant joints and T-bolt clamps on the induction side.
Q: Will these fit other Fiesta models?
A: We cover a range of Ford models - browse the Ford range or our vehicle-specific kits to find your exact fit.
