Bull-X downpipes Audi RS4/RS5 B9 quattro 450hp (HGDPVAG006M)

These Bull-X downpipes can be swapped 1:1 for the standard front pipes. The available catalytic converters offer a higher exhaust flow capacity and lower exhaust back pressure, which results in more power, lowers the exhaust gas temperature and relieves the turbochargers. This is further supported by the enlarged pipe diameter of 121-101mm and the elimination of the second catalytic converter. From the original turbo flange, the downpipes run at 121mm, then continue at 101mm and are only reduced to 76mm right at the original flange. Also ideal for tuned vehicles. In addition, fitting these downpipes brings a sound gain (change in sound). Especially in combination with a sports exhaust system. - OEM downpipes each have 2x cats fitted; the Bull-X downpipes are fitted with a maximum of one cat - incl. integral insulation - Material: stainless steel - Fully TIG-welded - clearly audible sound gain (even with the OEM exhaust system) - if the cat variant “with HJS 200-cell Euro6 cat” is selected, no software adaptation is necessary / no cat monitoring error message appears (only on models WITHOUT OPF) Note for models with OPF: a software adaptation is necessary when fitting the downpipes. Both the temperature sensors and the differential pressure sensors must be coded out. Pre-facelift: the downpipes are supplied without sensor connections to avoid unnecessary costs. 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.

TÜV / ABE available upon request

We currently ship within Europe only.

If a part is not available, we will contact you with an estimated wait time.

If you wish to return a product after receiving it, we offer a 14-day returns policy. Custom-made products are not eligible for return, and return shipping is at the customer's expense. Full delivery and returns terms are on the “Delivery Information” page — the link is at the bottom of the page.

Products come with a warranty, detailed in a certificate included in the box.

To make a valid claim, you must prove the damage was not caused by you and that the warranty certificate is valid.

Full terms are on the “Terms & Conditions” page — the link is at the bottom of the page.