Maximise your BMW S58 engine’s performance with G-Tech Motorsports 3.5” stainless steel deceit downpipes. These high-flow downpipes reduce backpressure, allow turbos to spool faster, and deliver sharper throttle response with a deeper, more aggressive exhaust tone. Key Features & Benefits Material: SS304 aircraft-grade stainless steel, TIG welded for strength 3.5” mandrel-bent tubing for unrestricted flow Power gains: Improves mid-range torque and overall horsepower Faster turbo spool for sharper response Lower EGTs: Reduces exhaust gas temperatures and backpressure Aggressive sound: Deeper, motorsport exhaust tone Lightweight: Significant reduction vs OEM catalytic converters Installation: Includes gaskets and bolts for professional fitment Finish: Brushed stainless steel for clean motorsport appearance Warranty: Lifetime coverage for manufacturing defects Vehicle Compatibility / Fitment BMW M3 G80 (2020+) BMW M3 Touring G81 (2020+) BMW M4 Coupe G82 (2020+) BMW M4 Convertible G83 (2020+) BMW M2 G87 BMW X3M LCI BMW X4M LCI Technical Specifications Material: SS304 stainless steel Diameter: 3.5” mandrel-bent tubing Welds: TIG precision welded in-house Finish: Brushed stainless steel Hardware: Gaskets and bolts included Weight reduction: Compared to OEM catalytic converters Installation Information Tools required: Standard hand tools, torque wrench, exhaust jack or lift recommended Estimated install time: 2–3 hours Professional installation highly recommended Designed for motorsport or off-road use only Performance Gains / Why It’s Needed These downpipes remove the restrictive factory cats, improving exhaust flow and turbo efficiency. Faster spool and increased mid-range torque make the S58 engine more responsive, lower exhaust gas temperatures help reliability, and the lighter construction reduces overall vehicle weight. Perfect for track, spirited driving, or high-performance setups. What’s Included in the Kit 2x G-Tech 3.5” stainless steel downpipes Gaskets and bolts for direct fitment Brushed stainless steel finish for professional appearance Warranty & Guarantee Lifetime manufacturer warranty against defects Returns accepted for unused items in original packaging Ideal BMW M3 M4 performance upgrade, S58 turbo upgrade, aftermarket downpipes, exhaust tuning. Pair with BMW cat-back exhausts or Eventuri intake systems for maximum performance. FAQs Q1: Will these work with stock exhaust? Yes, they fit OEM flange positions and work with stock cat-back systems. Q2: Do they fit aftermarket exhausts? Yes, if the aftermarket system retains factory flange positioning. Q3: Are they road legal? These downpipes are designed for motorsport or off-road use only. Q4: Is professional installation required? Yes, professional fitting is strongly recommended due to high-temperature components. Q5: What performance gains can I expect? Faster turbo spool, sharper throttle response, lower EGTs, more torque, and a deeper exhaust tone.
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