Bull-X downpipe 3.5" VAG 1.8T front-wheel drive (e.g. Golf 4, A3 8L) (HGDP18T89M)

The HG-Motorsport downpipe for VAG 1.8T models is a 100% direct replacement for the factory part. Perfect fit and high-quality materials make this item a top product in our range. By optimising the diameter, pipe routing and/or catalytic converter, the load on the turbocharger can be greatly reduced. Lower back pressure and reduced thermal load produce a clear gain in torque and power and an earlier response, while at the same time extending durability. Technical details Plug & play solution - perfect fit, simply swaps for the original component high-quality materials Made in Germany - genuine quality from our own production flow-optimised and performance-enhancing improved durability and response optimum evacuation of exhaust gases - no disruptive edges at the transitions Designed and developed using flow simulation. Tested on the dyno. No more heat build-up at the turbocharger, and therefore less thermal load on the turbo. Better response and increased performance. Fuller exhaust sound (especially in combination with a sports exhaust system) The advantages at a glance Pipe diameter: inlet at 3.5" (89mm) up to the flex pipe, then transitioning to 76mm made of stainless steel fully TIG-welded optionally with dummy cat, incl. 100-cell sports cat, incl. 200-cell sports cat, with Bull-X 200-cell EOBD sports cat by HJS incl. adapter 76mm to 55mm for fitting to the original exhaust system This item is not approved for use on public roads - For racing purposes only! CAUTION! All catalytic converters/cat replacement pipes offered, except the EC-tested catalytic converter from HJS, are not approved under the German road traffic regulations! Only with the EC catalytic converter may you legally drive your vehicle on public roads. The use of all other catalytic converters is intended for racing purposes only. If, despite our notice, you fit a downpipe with a catalytic converter WITHOUT EC approval, you are committing a criminal offence. Possible consequences include: invalidation of the operating licence, decommissioning of the vehicle, a complaint for tax evasion, and possible investigations by the environmental authority. Catalytic converter information If you select a downpipe without a cat or with a 100/200-cell cat, the control unit may log an error message from the post-cat lambda sensor; this does not restrict driving, as the first lambda sensor is still there for engine management. The post-cat sensor is only responsible for monitoring the cat’s effectiveness. This can be programmed out by a chip tuner by adapting the software. Most vehicles up to the Euro 3 emissions standard have no post-cat oxygen sensor, and installation is possible without further adaptation and without error messages. The washcoat content of HJS ECE and EOBD cats is significantly higher and is characterised by a very high oxygen storage capacity, which means error messages can be avoided. The EOBD cats have been tested for this up to Euro 4. Durability and use up to the Euro 6 emissions standard are of course guaranteed. On Euro 5/6 vehicles, the points mentioned above can only be avoided if a cat with ECE approval is selected. For more information on emission classes and how a catalytic converter actually works, please click here.

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