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Fiesta ST · Sound
Fiesta ST Cat-back exhaust Install Guide
Your Fiesta ST
Pick your year to see what fits.
This page covers the US Fiesta ST.
+2–8 whp (est.)
Hard$850–$9502–3 hrs
Why do it
Better sound and a little more flow.
Tools you'll need
- Jack and 4 jack stands
- Socket set
- Torque wrench
- Saw for the stock pipe
Starting out? See our budget tool list.
Parts to buy
- Mishimoto cat-back exhaust The same exhaust as our video.Fits 2014–2019
Doesn't fit your car (0)
Double-check fitment before buying. We may earn a commission when you buy through these links, at no extra cost to you.
Steps
Cut out the old exhaust
- Cut the stock exhaust into pieces and pull it.
Clear the rear beam
- Unbolt the crossmember and sensor wires.
Fit the mid pipe
- Hang the mid pipe and fit the gasket.
Fit the muffler
- Hang the muffler and clamp it on.
Finish up
- Tighten it all and refit the rear parts.
How to know it worked
- No exhaust leaks at the joints.
- Tips sit even in the bumper.
- Nothing touches the body.
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Safety first
- Park on flat ground, set the parking brake and chock the wheels.
- Never get under a car held up only by a jack. Use jack stands.
- Let the engine and exhaust cool first.
- Disconnect the battery before unplugging electrical parts.
- Wear safety glasses.
- If something doesn't match your car, stop and ask a shop.
Follow your part's instructions and your service manual's torque specs.
Cat-Back Exhaust install guides for other cars