The throttle body is an important part of your air intake system that controls the air flowing into your engine. It's located between your air intake and engine manifold where fresh air is pulled into the engine for the combustion process. Like all other components in your 2015 [MALE] Focus, factory throttle bodies are OK for an unmodified engine. Once you have an upgraded performance vehicle, and a performance tune, you will be in need of a new throttle body. Since the engine is basically a large air pump, increasing the air intake level with a new throttle body will increase the engine's power output as well, in some cases by up to 15 to 25 hp.

While increasing horsepower is the main reason someone would add a larger throttle body, another benefit is added throttle response. Many auto manufacturers measure a car’s airflow at the peak RPMs and then choose a throttle body that ensures 50% of throttle will produce 50% airflow. While that formula works for everyday driving, it’s not optimal for those with high performance vehicles. By adding a larger throttle body, you’ll feel a sharper increase in the engine’s responsiveness, especially at a higher RPM, since the engine’s airflow is increased.

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DIABLO 18862-2
Please Note:

Some images might not represent the actual product

DIABLO 18862-2 Accelerator Pedal Boost Module
for 2015 Ford Focus ST

$348.97

Save: $45.52
Sale Price:

$303.45

Estimated Ship Date: Today

Free DelieveryFree Ground Shipping
In Stock - 3 New In Stock
EngineFit NotesFitment Notes
2015 Ford Focus ST equipped with
2.0L L4
 
5 Preset Throttle Curves
3 Customizable Throttle Slot
Incl. Wireless Control Switch/Mobile App For Android And IOS
Not Legal For Sale or Use In California
Fuel Type: GAS
 
2015 Ford Focus ST equipped with
2.0L L4 5 Preset Throttle Curves
3 Customizable Throttle Slot
Incl. Wireless Control Switch/Mobile App For Android And IOS
Not Legal For Sale or Use In California
Fuel Type: GAS
,
BD Diesel 1057932
Please Note:

Some images might not represent the actual product

BD Diesel 1057932 Accelerator Pedal Boost Module
for 2015 Ford Focus ST

$338.08

Save: $44.10
Sale Price:

$293.98

Estimated Ship Date: Today

Free DelieveryFree Ground Shipping
In Stock - 3 New In Stock
EngineFitment Notes
2015 Ford Focus ST equipped with
L,
2.0L L4,
1.0L L3
 
2015 Ford Focus ST equipped with
L,
2.0L L4,
1.0L L3
,
JMS Chips USA PX1114F
Please Note:

Some images might not represent the actual product

JMS Chips USA PX1114F Accelerator Pedal Boost Module
for 2015 Ford Focus ST

$333.21

Save: $43.46
Sale Price:

$289.75

Estimated Ship Date: Today

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In Stock - 5 New In Stock
EngineFitment Notes
2015 Ford Focus ST equipped with
L
 
2015 Ford Focus ST equipped with
L
,
Injen PT0013B
Please Note:

Some images might not represent the actual product

Injen PT0013B Electronic Throttle Controller
for 2015 Ford Focus ST

$264.44

Save: $34.49
Sale Price:

$229.95

Estimated Ship Date: Today

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In Stock - 17 New In Stock
EngineFitment Notes
2015 Ford Focus ST equipped with
2.0L L4 Turbocharged
 
2015 Ford Focus ST equipped with
2.0L L4 Turbocharged