Category Archives: Ford Fiesta ST Downpipe 2014+

Downpipe for What – Fiesta ST Downpipe R&D, Part 3: Final Prototype

We are back with more on our Fiesta ST downpipe project. We know you are long overdue for an update, so we’ll dive right in. After fabrication, we read that some other aftermarket downpipes for the Fiesta ST weren’t as successful at making power as downpipes typically are on other applications. We still wanted to test our downpipe designs to see the data for ourselves, and decide if the downpipe was worth manufacturing for the Fiesta ST. After testing was completed, the data confirmed our suspicions that the Fiesta ST is pretty darn efficient on its own, and the addition of … Continue Reading ››

Downpipe for What – Downpipe R&D, Part 2: Creating the Prototypes

In our last post we took a look at the stock Fiesta ST downpipe as well as our slotted flange design based on the stock flange. We are still planning to create both a catted downpipe and a non-catted downpipe for race applications, so let’s take a look at the progress!

Downpipe Design

After fitting the flange to the turbo, we began to piece together the rest of the downpipe coming off the flange and meeting with the exhaust. Both our designs feature a slotted flange that bolts to the turbo, in addition to a flex pipe near where they meet with … Continue Reading ››

Downpipe for What – Downpipe R&D, Part 1: Initial Fabrication

Introduction and the Stock Downpipe

Another addition to the Fiesta ST collection! Our Fiesta build is coming along nicely, and I am happy to announce some progress on our downpipe project. As with any R&D undertaking the first step is to take a look at the stock setup and see how it can be improved.
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Stock Fiesta ST downpipe
Although Ford has a pretty nice design, we are planning to make it a bit better by increasing the diameter of the downpipe to 3” throughout. As opposed to the … Continue Reading ››