Enhance the exhaust flow and sound of your BMW F80 M3 or F82/F83 M4 with the Milltek Sport Secondary Catalyst Delete Pipe. Engineered specifically for the S55 twin-turbocharged inline-six engine, this performance exhaust component replaces the secondary catalyst section to reduce exhaust restriction and deliver a more pronounced exhaust note.
Manufactured from premium T304L stainless steel, the Milltek Secondary Catalyst Delete Pipe features a 3-inch (76.2mm) diameter design that promotes efficient exhaust gas flow. By eliminating the restriction associated with the secondary catalyst section, this upgrade is designed to improve exhaust flow and enhance the overall sound characteristics of the vehicle.
The non-resonated configuration allows more of the S55 engine's distinctive exhaust character to be heard, particularly during acceleration and higher-RPM driving. When paired with a compatible Milltek Sport cat-back exhaust, the system provides a more aggressive exhaust experience while maintaining the quality and precision associated with Milltek's performance exhaust products.
Designed specifically for Milltek Sport cat-back exhaust systems, this secondary catalyst bypass is compatible with both factory BMW primary downpipes and Milltek Sport primary downpipes. Its precision-engineered construction provides direct integration with the intended exhaust configuration without requiring cutting or welding.
Milltek manufactures its exhaust components in the United Kingdom using high-quality materials and performance-oriented engineering. The T304L stainless-steel construction offers excellent corrosion resistance and durability under demanding exhaust temperatures.
For BMW M3 and M4 owners seeking increased exhaust volume, reduced exhaust restriction, and a more engaging driving experience, the Milltek Sport Secondary Catalyst Delete Pipe is an excellent addition to a compatible Milltek exhaust system.
Fits 2014–2018 BMW M3 Sedan (F80) with 3.0L S55 twin-turbocharged engine
Fits 2014–2018 BMW M3 Competition Sedan (F80) with S55 engine
Fits 2014–2018 BMW M4 Coupe (F82) with S55 engine
Fits 2014–2018 BMW M4 Competition Coupe (F82) with S55 engine
Fits 2014–2018 BMW M4 Convertible (F83) with S55 engine
Designed for non-OPF/GPF-equipped vehicles only
Requires a compatible Milltek Sport cat-back exhaust system
Compatible with factory BMW primary downpipes
Compatible with Milltek Sport primary downpipes
Not designed for direct installation with the factory BMW cat-back exhaust
Not intended for BMW G80/G82 M3/M4 applications
Removes a catalytic converter and is intended for motorsport or off-road applications where legally permitted
Not emissions-approved for public-road use
Professional installation recommended
Milltek Sport secondary catalyst bypass pipe
Required fitting components as supplied by Milltek
Sold Separately:
Milltek Sport cat-back exhaust system
Milltek Sport performance downpipes
Additional exhaust components and accessories
Manufacturer: Milltek Sport
Part Number: SSXBM1032
Component Reference: MSBM268REP
Product Type: Secondary Catalyst Delete / Bypass Pipe
Vehicle Applications: BMW F80 M3 / F82 F83 M4
Engine: 3.0L S55 Twin-Turbocharged Inline-Six
Construction: T304L Stainless Steel
Pipe Diameter: 76.2mm (3 Inches)
Configuration: Non-Resonated
Catalytic Converter: Secondary Catalyst Delete
Primary Downpipe Compatibility: Factory BMW / Milltek Sport
Cat-Back Compatibility: Milltek Sport Systems Only
Installation: Direct-Fit with Compatible Milltek Exhaust
Cutting or Welding Required: No
E-Mark Approval: No
Manufacturer Classification: Race Product
Country of Manufacture: United Kingdom
Secondary catalyst bypass design reduces exhaust restriction and promotes improved exhaust gas flow.
3-inch stainless-steel tubing provides a high-flow exhaust path designed for the BMW S55 engine.
Aggressive non-resonated sound enhances exhaust volume and delivers a more pronounced performance exhaust note.
Premium T304L stainless-steel construction provides excellent corrosion resistance, strength, and durability.
Factory and Milltek downpipe compatibility allows integration with either original BMW or Milltek Sport primary downpipes.
Precision-engineered Milltek fitment provides direct installation with compatible Milltek Sport cat-back exhaust systems.
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