RASTP Performance Air Intake Induction Kit | For VW Golf MK4 GTI Audi A3 1.8T

Upgrade your 1.8T engine with the RASTP Performance Air Intake Induction Kit. Designed for VW Golf MK4 GTI and Audi A3 models, this kit improves airflow for better throttle response and a more aggressive engine sound. A simple modification that makes a noticeable difference on the road.

This kit is built around a high-flow cone air filter that replaces the restrictive factory air box. The dual-layer foam element traps dirt while allowing a higher volume of air into the engine. This helps your turbocharged 1.8T breathe easier, especially during hard acceleration.

The included heat shield is a key part of the design. It mounts directly to the factory air box points, creating a barrier between the filter and the hot engine bay. This helps keep intake air temperatures lower, which is important for maintaining power on warm days or in stop-and-go traffic.

Installation uses the included silicone coupler and full fitting kit. The 4-ply silicone connector creates a secure seal to the MAF sensor housing. All necessary nuts, bolts, and clamps are provided, making this a direct replacement for the stock system.

Key Features and Benefits

- High-flow cone filter with dual-layer foam that increases airflow to the engine for improved throttle response.

• Precision-folded black powder-coated heat shield that mounts to factory points to block engine heat and maintain cooler intake air.

• 4-ply silicone coupler that provides a strong, leak-free connection between the filter and the MAF housing.

• Full fitting kit with all nuts, bolts, and clamps included for a straightforward installation without needing extra parts.

• Spun aluminum filter base with a velocity stack inlet that reduces air turbulence for smoother airflow.

Who Is This For

- Owners of a VW Golf MK4 GTI or Audi A3 1.8T looking for a direct bolt-on intake upgrade.

• Drivers who want a more responsive throttle and a louder induction sound without a full turbo-back exhaust.

• Enthusiasts planning future tuning who need a less restrictive intake as a first step.

• Anyone rebuilding or replacing a worn factory air box on their 1.8T platform car.

Usage Scenario

Mark had been daily driving his 2002 Golf GTI 1.8T for three years. The factory air box felt sluggish on on-ramps, and he wanted a bit more sound without going full aftermarket. He installed the RASTP kit in his driveway using basic hand tools. The first time he hit the highway, he noticed the turbo spool was more audible and the car felt more eager to rev. The heat shield kept the filter away from the radiator heat, so performance stayed consistent even in summer traffic.

Micro Comparison

Compared to a simple cone filter that hangs loose in the engine bay, this RASTP kit includes a dedicated heat shield that mounts to the factory air box points. That shield helps keep intake temperatures lower than an open filter setup. It also includes the silicone coupler and all hardware, so you don't need to source extra parts. For a 1.8T owner, this is a more complete solution than just buying a universal filter.

Specifications

Material: Foam Filter + Black Silicone Coupler + Aluminum Heat Shield

Inlet Size: 70mm / 2.75 in and 76mm / 3 in

Color: Black

Item Weight: 1.3 kg / 45.9 oz

Manufacturer Part Number: OFI140-BK

Package Includes

For 70mm Air Filter Kit:

1 x Air Filter Kit (includes heat shield, silicone coupler, and all mounting hardware as shown in the product images)

For 76mm Air Filter:

1 x Air Filter (heat shield and some accessories are not included; refer to product images for details)

Why You Will Love It

You will love the immediate difference in engine response when you step on the gas. The sound alone makes every drive more engaging, and knowing your engine is getting cooler, cleaner air adds peace of mind. It is a weekend project that transforms how your car feels on the road.

Questions and Answers

Question: Will this fit my 2001 Audi A3 1.8T?

Answer: Yes, it is designed for the 1.8T engine in the Audi A3, TT, and VW Golf MK4 GTI. It fits the 70mm MAF sensor housing.

Question: Does this kit come with a heat shield?

Answer: The 70mm Air Filter Kit includes the heat shield and all mounting hardware. The 76mm Air Filter option does not include the heat shield.

Question: Is professional installation required?

Answer: Professional installation is highly recommended. No instructions are included, so experience with intake systems is helpful.

Question: What is the difference between the 70mm and 76mm options?

Answer: The 70mm kit is a full intake system for cars with a 70mm MAF housing. The 76mm filter is a standalone filter that fits any 76mm / 3 inch intake hose.

Question: Will this work with a stock turbo setup?

Answer: Yes, it is a direct upgrade for stock turbo 1.8T engines. It can also support mild tuning upgrades.