Unlock the full potential of your BMW S55 engine with G-Tech Motorsports stainless steel decay downpipes. Designed for M3, M4, and M2 Competition models, these downpipes improve turbo efficiency, reduce backpressure, and deliver a deeper, more aggressive exhaust note for track and street driving. Key Features & Benefits Material: High-quality T-304 stainless steel with TIG welds for durability Integrated flex joint: Reduces strain on exhaust system and simplifies installation Mandrel bends: Maintains maximum internal diameter for optimal flow Performance gains: 15–20bhp increase, faster turbo spool, sharper throttle response Weight reduction: Lighter than stock cats, improving handling and overall vehicle dynamics Exhaust sound: Aggressive, race-inspired tone Vehicle Compatibility / Fitment BMW F80 M3 (2014–2019) BMW F82 M4 Coupe (2014–2019) BMW F83 M4 Convertible (2014–2019) BMW F87 M2 Competition (2018–2019) Technical Specifications Construction: T-304 stainless steel Finish: Brushed stainless steel Flex joint: Included for alignment flexibility Internal diameter: Optimized for maximum exhaust flow Mandrel bends: Maintain mid-range torque while improving flow Installation Information Tools required: Basic hand tools, torque wrench Estimated install time: 2–3 hours Professional fitting recommended due to variations in exhaust alignment Lambda sensor spacers recommended to prevent check engine light (sold separately) Note: OPF/PPF filter coding may be required on certain models Performance Gains / Why It’s Needed These downpipes remove restrictive factory catalytic converters, allowing your turbos to spool faster, reducing exhaust gas temperatures and backpressure. The result is sharper throttle response, higher combustion efficiency, and a more aggressive exhaust note. Real-world gains of 15–20bhp make acceleration more responsive for spirited driving or track use. What’s Included in the Kit 2x stainless steel decat downpipes Integrated flex joints Mandrel bends for optimal flow Brushed stainless finish for race-inspired look Warranty & Guarantee Manufacturer-backed warranty against defects Returns accepted on unused items in original packaging This kit is a must-have BMW S55 performance upgrade for enthusiasts looking for decat downpipes, turbo efficiency improvements, and aggressive exhaust upgrades. Pair with our BMW S55 Intake Systems or Exhaust Upgrades for maximum performance. FAQs Q1: Do these downpipes fit stock airboxes? Yes, they are compatible with stock setups, but professional fitting is recommended. Q2: Will I need to code my car? Yes, M2 Competition and some later F80/F82/F83 models require OPF/PPF coding. Q3: Are there gains on standard cars? Yes, expect faster turbo spool, sharper throttle, and a deeper exhaust tone. Q4: Is installation difficult? Professional installation is recommended due to exhaust alignment differences, but many users report straightforward fitting. Q5: Will the check engine light appear? Use Lambda sensor spacers to prevent CEL; these are sold separately.
