Airtec – 2.5” Big Boost Pipes Kit 70mm – Ford Focus ST / RS MK2

Airtec – 2.5” Big Boost Pipes Kit 70mm – Ford Focus ST / RS MK2

AirtecATMSFO55

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Throttle body size: Standard 63mm

Color hose: Black

Car option: Focus RS

Price:

This Airtec 2.5” Big Boost Pipes kit with 70mm cold side is developed for Ford Focus ST and RS MK2 and ensures better airflow, higher boost efficiency and more power.

The upgrade replaces the restrictive 2.0” OEM piping with larger 2.5” aluminum tubes. In combination with the 70mm cold side, the airflow is further optimized, resulting in more power, better response and reliability at high boost pressure.

Advantages

• Larger 2.5” boost pipes for better airflow
• 70mm cold side for maximum airflow
• +11.8 bhp and +9 lb/ft gain (bolt-on)
• Faster turbo response
• Fewer restrictions than OEM pipes
• Ideal for high-performance builds (375+ bhp)

Technical specifications

• Material: lightweight aluminum tubes
• Diameter hot side: 2.5”
• Cold side: 70mm (option 63mm or 70mm throttle body)
• Silicone couplings: 5-ply
• Finish: black
• Swaged pipe ends to prevent coming loose

Compatibility

• Ford Focus ST MK2 (ST225)
• Ford Focus RS MK2

Important compatibility info

• ST225 must have 2.5” intercooler outlets (OEM is 2”)
• Does NOT fit Stage 1/2 intercoolers
• DOES fit on Stage 3 intercoolers

Compatible with intercoolers

• Airtec
• Pace
• Pro Alloy
• Forge
• OEM Ford

• Complete boost pipe kit
• Aluminium pipes
• Silicone couplings
• Assembly parts

Important information

• Symposer delete included
• Assembly: ±1–2 hours
• Check clearance during installation (radiator clearance)
• Custom colors on request (5–10 days delivery time)

Frequently Asked Questions

What does this upgrade bring?
More power, better airflow, and more stable performance at high boost.

Is this plug & play?
Yes, direct replacement without modifications (provided the correct intercooler).

Who is this suitable for?
Especially for high-performance setups from ±375 bhp.

You have the right to cancel your order up to 14 days after receipt without giving a reason. After cancellation, you have another 14 days to return your product. You will then be credited with the full order amount, excluding shipping costs. Returns must be shipped with tracking. Return shipping costs are your responsibility.

This returns policy does not apply to business customers. For more information, please refer to our terms and conditions for business customers. See our general terms and conditions here.