Pipercross Performance Intake System
A vehicle-specific Pipercross Performance Induction System, designed to deliver improvements in power, efficiency and induction sound through a bespoke design tailored to the application.

Pipercross MK8 Ford Fiesta ST Intake System
The Pipercross Intake System is designed and engineered to directly replace the OEM airbox and intake plumbing on the Ford Mk8 Fiesta ST with the 1.5L turbocharged engine.

PRODUCT HIGHLIGHTS

• Large filter heatshield featuring:
  • Use of the OE fresh-air ducting
  • Significantly larger shielded intake volume vs. the OE closed airbox
  • Isolation edge trim at the hose-to-heatshield pass-through junction
  • OE grommet plus chassis hard-point mounting system
• Bespoke Pipercross conical air filter using market-leading foam filtration media
  • Conical air filter increases filtration surface area by 158.46% over a typical foam panel filter
• Thick-walled silicone hose for optimal internal airflow characteristics, while maintaining engine decoupling and integrating an IAT sensor
  • Additional aluminium, hard-anodised female IAT bung; CNC-machined to exacting tolerances for OE sensor fitment/functionality
• Stainless steel hardware for long-term corrosion protection
• Designed, prototyped and refined using current 3D scanning, printing and CAD technology
• Testing validation
  • Final design tested on a Mk8 Fiesta ST with Stage 1 aftermarket tuning, an aftermarket intercooler and a full aftermarket exhaust system
  • 9 BHP / 10.0 ft.-lb. maximum power gain, 3.11 BHP / 3.0 ft.-lbs. average power gain vs. the full OE intake system

OEM INTAKE ASSESSMENT
The OEM intake system on the Ford Mk8 Fiesta ST shows ST-tier performance engineering on the 1.5T engine and Mk8 Fiesta ST chassis. These intake characteristics serve the 1.5T engine well when running OE engine programming. However, OE intake capacity falls significantly short of turbocharger airflow demand once even modest aftermarket tuning is applied, opening the door to noticeable gains with an aftermarket intake system.

The Pipercross engineering team identified the OE panel filter size and filtration media, the OE airbox and the OE convoluted intake hose as areas with scope for improvement. The OE fresh-air ducting and OE airbox mounting points/grommets were retained in the Pipercross kit, based on those parts' size, function and Pipercross engineers' experience with intake design across a range of chassis and engines.

AIR FILTER
The core of the kit is the Pipercross conical air filter. It uses Pipercross' established air filter construction methods to achieve the kit's airflow target while maintaining the OE-level filtration required for engine longevity. The bespoke Pipercross foam mesh blend balances increased flow with effective air filtration, while the coated steel backing and formed-then-coated aluminium base reflect decades of Pipercross filter manufacturing experience. The conical filter increases filtration surface area by 158.46% over a typical foam panel filter insert, forming the foundation for the rest of the kit's performance gains.

HEATSHIELD
The Pipercross Mk8 Fiesta ST heatshield is designed to accommodate the largest practical air filter while continuing to use the OE fresh-air duct and OE airbox mounting grommets. The heatshield is CNC laser cut from 2mm aluminium sheet, then powder coated for corrosion resistance and a clean appearance. It uses all available engine bay volume left by the OE airbox, partitioning the 180mm filter from engine bay heat on three sides plus a close seal against the underside of the bonnet.

This design creates a semi-closed cavity around the filter, fed by fresh ambient air via the OE ducting. The semi-closed shield, increased filtration surface area and conical filter shape all increase induction noise, amplifying the turbocharger sound for a more engaging driving experience.

INTAKE HOSE
The Pipercross intake hose complements the air filter and heatshield. It mirrors the flexibility and heat-resistance of the OE hose, both important for kit performance and longevity. The thick-walled silicone construction offers significantly better thermal rejection than aluminium hard-pipe alternatives, which helps keep intake air temperatures into the turbocharger acceptable during sustained spirited driving. The silicone construction and the part's shape/size also provide enough compliance for engine movement, helping prevent premature wear of both the Pipercross and OE components. The thick-walled construction resists hose collapse under full turbocharger load and high engine bay temperatures. Unlike the OE hose, the Pipercross part integrates an IAT sensor take-off, allowing correct sensor placement and function with minimal internal flow disturbance. The exterior is finished in textured black for a clean look in the Mk8 Fiesta ST engine bay.

DETAILS
The detail work on the kit sets it apart. The Pipercross heatshield uses bracketry to connect to the OE vibration-damping chassis mounts, alongside a fixed mounting point (via an additional bolt-on front bracket) for a balance of part stability and vibration isolation. A 6061 T6 aluminium, hard-anodised intake air temperature sensor mounting bung is CNC machined to tight dimensional specifications to ensure OE-level fitment and function. Fully stainless-steel hardware is supplied to resist corrosion, oil and other adverse engine bay conditions.

RESEARCH AND DEVELOPMENT
All Pipercross products are designed in-house using current 3D-printing, 3D-scanning, CAD, CFD, airflow testing and performance testing technologies. The Pipercross Mk8 Fiesta ST Intake Kit went through several design iterations to fit the largest practical air filter and heatshield while meeting the kit's design criteria. Performance testing of the OEM and final Pipercross intake design was completed at a third-party, independent, environmentally regulated Dyno Dynamics 4WD dynamometer cell for unbiased final results.

PERFORMANCE TESTING DATA
The final Pipercross Mk8 Fiesta ST Intake Kit was tested on a Mk8 Fiesta ST with Stage 1 aftermarket tuning, an aftermarket intercooler and a full aftermarket exhaust system. Testing was carried out on a third-party, independent 4WD Dyno Dynamics dynamometer in a temperature- and airflow-controlled test cell. Only the intake system was changed between tests; all runs were conducted on the same day in the same cell, with the vehicle allowed to cool between sets.

The graphed data shows the average of three runs for each configuration. The Pipercross intake delivers a substantial increase over the OE system, particularly at peak torque and at engine speeds above 4250 RPM. Peak gains are +9HP and +10ft-lbs of torque, with consistent gains throughout the rev range. Each configuration's three runs landed within ~5% of each other, indicating both intakes are resistant to performance loss from sustained elevated engine bay temperatures, and confirming the performance benefit of the Pipercross parts over the OE system.