MAD Catless Downpipes for BMW S55 with Flex Section

Upgrade your factory S55 downpipes to MAD’s catless downpipes for maximum airflow, performance, and sound!
Replacing the restrictive OEM catalytic converters eliminates backpressure, allowing your turbochargers to spool faster and reach peak performance. As a bonus, your car will sound significantly more aggressive.

Expect gains of up to 30 horsepower on a tuned S55 with stock turbos—and even more with upgraded turbos.
The integrated flex section reduces engine movement-related stress and vibrations caused by heat and shifting. 

Features:

• Compatible with both left-hand and right-hand drive models

• Smooth bends for optimal airflow and zero rattling

• Gains up to 30 HP on stock turbos, more with upgraded ones

• Perfect OEM-like fit

• Built-in flex section for vibration dampening

WARNING:

Cat-less Downpipes are for OFF ROAD USE ONLY. Using these will result in a check engine/service engine soon light. Federal and many state laws prohibit the removal, modification or rendering inoperative of any part or element of design effecting emissions or safety on motor vehicles used for transporting persons or property on a public street or highway.