Milltek Large Bore Downpipe Pair | BMW F80 M3 F82 M4

Description

Milltek Large Bore Downpipe Pair with Hi-Flow Sports Catalysts for BMW F80 M3 and F82 M4. Direct bolt-on upgrade fabricated in T304L stainless steel with mandrel-bent construction. Larger diameter than OEM reduces backpressure and increases exhaust scavenging efficiency, delivering measurable performance gains and refined sound character when paired with a Milltek cat-back exhaust system. Hand-finished T304L stainless construction with CNC-formed flanges and OEM-style hangers. Hi-Flow Sports Catalysts maintain emissions compliance while maximizing flow. Stage 2 ECU remap required for optimal results. Installation requires two lambda sensor extensions (BMW part 18307851168, available from any BMW dealer). Uses factory bolt points—no welding or modification required. Fitment Details • BMW F80 M3 (2014-2018) with S55 engine • BMW F82 M4 (2014-2018) with S55 engine • Requires Milltek cat-back exhaust system for complete integration • Not compatible with factory M Performance exhaust Fits Milltek Cat-Back. Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Fits 10 vehicles including:

• 2014 BMW M3— F80 M3 & M3 Competition Saloon (Non OPF/GPF Models Only) > 2014 to 2018
• 2015 BMW M3— F80 M3 & M3 Competition Saloon (Non OPF/GPF Models Only) > 2014 to 2018
• 2016 BMW M3— F80 M3 & M3 Competition Saloon (Non OPF/GPF Models Only) > 2014 to 2018
• 2017 BMW M3— F80 M3 & M3 Competition Saloon (Non OPF/GPF Models Only) > 2014 to 2018
• 2018 BMW M3— F80 M3 & M3 Competition Saloon (Non OPF/GPF Models Only) > 2014 to 2018
• 2014 BMW M4— F82/83 M4 Coupe/Convertible & M4 Competition Coupe > 2014 to 2018
• + 4 more vehicles