Milltek Secondary Catalyst Bypass Pipe - Mercedes C63 AMG - SSXMZ103

The Milltek Secondary Catalyst Bypass Pipe removes the secondary catalyst from dual-pipe exhaust assemblies, reducing backpressure and improving gas flow through OE exhaust systems. Engineered for vehicles equipped with secondary catalytic converters.

Installation & Construction: Mandrel-bent T304L stainless steel. Requires cutting of the OE system. Uses existing OEM hangers and attachment points—no modification to the primary exhaust required. Direct integration with stock exhaust piping.

Fitment: Designed for vehicles with dual-pipe exhaust architecture and secondary catalyst configurations. Verify your vehicle's catalyst layout before ordering.

Every bypass pipe is dyno-validated for measurable flow improvement.

Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Specifications

• Pipe diameter: 69.85mm (2.75")
• Off-road / competition use only. Not legal for use on public roads in the US.

Fitment

• Mercedes > C-Class > C63 AMG > 2007 to 2011
• Mercedes > C-Class > Coupe 63 AMG > 2007 to 2011

• Free US shipping on orders over $250.
• Free pickup at our Dallas shop, usually ready within 24 hours.
• Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
• Want it installed? Book the install at thegbmotors.com.

Full details are on our shipping and returns page.