Racingline silicone boost hose kit for MQB Evo 2.0 TSI EA888.4

The Racingline silicone boost hose kit is a direct replacement for the soft rubber charge hoses fitted to the latest fourth-generation 2.0 TSI EA888.4 engines. The factory hoses are designed for standard boost pressures, but on modified vehicles with higher pressures and temperatures they can stretch, deform or even collapse under load. The three-piece silicone kit solves this issue with reinforced hoses featuring smooth-flowing interiors, designed to withstand significantly greater loads.

Kit function

The kit replaces the three original charge hoses that carry compressed air between the turbocharger and intercooler and onwards to the engine. Replacing standard rubber with reinforced silicone creates a firmer and more consistent air path that does not inflate, soften or collapse under boost pressure.

The hoses feature stepped internal transitions at the joints, matched to the connection dimensions of the surrounding components. This ensures a smoother, more laminar air path, with less turbulence than designs without stepped transitions. The result is lower resistance for the turbocharger to overcome, allowing it to flow a greater volume of air more efficiently.

Key features

• Three-piece kit as a direct replacement for the original hoses, with no modifications required
• Reinforced silicone construction, rated for loads significantly greater than the turbocharger’s capacity
• Internal steel wire helix in both intercooler hoses prevents collapse under vacuum and at high temperatures
• Stepped internal transitions matched to the connection dimensions for smoother airflow
• Pressure-tested for long-term use at high boost pressure and high temperatures

Why the steel wire helix matters

Both intercooler boost hoses carry hot compressed air over longer sections, where bending is most likely. Racingline has integrated a steel wire helix into the silicone wall to maintain the correct round shape of the hoses in all conditions. The hoses remain flexible enough for installation and engine movement, but without wall deformation that reduces performance and operating consistency on modified vehicles.

Who the kit is for

The kit is especially suitable for modified 2.0 TSI EA888.4 engines operating at higher boost pressure than standard. It is intended for vehicles on the MQB Evo platform with the EA888.4 engine, including models from Volkswagen, Audi, SEAT and CUPRA.

Installation

Installation is straightforward for anyone comfortable with basic hand tools: remove the three factory hoses and replace them with the Racingline hoses. No cutting, drilling or adapters are required.

Racingline Performance develops its products under the demanding conditions of motorsport and then adapts them for road use. This silicone boost hose kit is a simple and effective upgrade that eliminates a known weak point of modified EA888.4 engines and helps the turbocharger deliver boost pressure more cleanly and reliably.

Suitable for: Audi S3 IV (8Y), Audi SQ2 I (GA), Cupra Ateca I (KH7), Cupra Formentor I (KM7), Cupra Leon IV (KL1), Škoda Octavia IV (NX3) / IV (NX5), VW Golf VIII (CD1) / VIII (CG5), VW T-Roc I (A1).

Compatible vehicles (manufacturer data)

Before ordering, check that the product matches your vehicle (model, year and engine). If in doubt, write to us — we will check for you.