The Aftermarket — High Flow Filter

The only power mod within the cobb stage 1 (other than the access port) is a High Flow Drop in Air Filter.  While the part by itself does not produce any horsepower or torque; when accompanied by a tune this turns into a rather cost effective modification.  The tune claims that it can bring up to 3% hp and 15% torque.

These high flow filters can be controversial due to their nature.  It makes consumers question why the stock filter isn’t good enough.  In addition to this if the other filter allows so much more air flow is it letting other debris Continue reading

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The Aftermarket — Mudflaps

Most people think installing mudflaps on a front wheel drive car doesn’t make sense.  However, the Fiesta ST is one of the few exceptions to this.  The ST utilizes a somewhat fake torque vectoring system.  Rather than limiting the torque through differentials or engine power the ST cuts power to specific wheels by utilizing the brakes.  This can cause the brakes and gas to be engaged at the same time and causes significant brake dust to build up along the side of the car.  In addition Continue reading

The Aftermarket – Turbo Options

Replacing the turbo is one of the last things people do it and it truly changes your car into an entirely different beast.  Typically with the Fiesta ST people look at installing larger larger turbos so that they can reach numbers of 350+ whp.

In a straight line these turbos will make a significant difference in performance and sound.  Around corners these larger turbos can be an issue as it becomes easier to drop out of the boost rev range.  If cornering at maximum g-force and the turbo kicks in this can set the car off balance and send the car into a wall.

The Aftermarket – Popular Aesthetics

Fiesta STs are beginning to become a popular SEMA car.  Initially I wasn’t a very big fan of the looks of the ST but it has grown on me over time, and the aftermarket ones look more impressive than ever.  Mods range from as simple as a rear spoiler extension all the way to a wide body kit for the car with extended wheel wells.

Many regular drivers jump instantly for lowering springs or coilovers as well as a front spoiler.  These two modifications can give the car a significantly more aggressive look but also come with the issue of scraping.  The car is already prone to scraping and lowering it further as well as adding something on bottom in the front remove from the daily drivability this car was designed for.