$1,050.00
Unleash the beast within your 5.5L Bi-Turbo AMG with the Untd. Performance Catless Downpipe, designed to deliver unrestricted flow, rapid turbo response, and an aggressive sound that turns every throttle input into a full-scale experience. Built for the M157 and M278 platforms, this downpipe transforms your E63 or CLS63 into the performance machine it was truly meant to be.
Available on backorder
Unleash the full fury of your 5.5L twin-turbo V8 with the Untd. Performance Catless Downpipe—a race-bred, track-tested upgrade that transforms your E63 or CLS63 AMG into a torque-rich, fire-breathing machine. By eliminating the restrictive factory catalytic converters, this downpipe delivers maximum performance, reduced turbo lag, and an intoxicating exhaust note that dominates the road.
Maximum Flow, Unrestricted Power
This full catless design removes the OEM catalytic converters entirely, reducing exhaust backpressure and dramatically improving flow. The result is faster turbo spool, sharper throttle response, and a significant increase in horsepower and torque across the powerband—especially under load.
Aggressive, Motorsport-Inspired Sound
With factory emissions components removed, the M157/M278 engine finally sounds as powerful as it is. Expect louder cold starts, more audible turbo whistle, and an aggressive, raw exhaust note with sharp crackles and pops during gear shifts and deceleration.
Durability Under Pressure
Constructed from 304 stainless steel with TIG welds and CNC-machined flanges, this downpipe is engineered to handle extreme temperatures and boost pressures without compromise. It’s built to perform under the most demanding street and track conditions.
Direct Bolt-On Fitment
This downpipe is a true bolt-on upgrade with no cutting or fabrication required. It mates directly to the stock turbochargers and connects to the OEM or aftermarket exhaust system, making installation straightforward and hassle-free.
Designed for High-Powered Builds
Whether you’re running a basic Stage 1 tune or building a fully upgraded, high-boost setup, this catless downpipe is the perfect foundation. It unlocks the full potential of supporting modifications such as larger turbos, upgraded intakes, and aggressive tuning.
Mercedes-Benz E63 AMG (W212) – 5.5L Bi-Turbo V8 (M157)
Mercedes-Benz CLS63 AMG (C218) – 5.5L Bi-Turbo V8 (M157)
Also compatible with select M278-equipped models
(Please confirm downpipe routing for M278 applications before purchase)
Untd. Performance components are built by enthusiasts who understand what performance cars demand. Every product is engineered with precision, tested under pressure, and made to deliver results—whether on the street or the circuit.
Note: This product is intended for off-road and motorsport use only. It is not emissions-compliant in all regions. Please consult your local laws before installation.
