Product Details
About this part
IRL F97/F98 X3M/X4M MaxFlow Resonated Downpipes
Refine the sound of your S58 without sacrificing performance with the IRL MaxFlow Resonated Downpipes for the BMW F97 X3M and F98 X4M. Designed for enthusiasts who want maximum exhaust flow with a deeper, smoother exhaust note, these downpipes reduce unwanted rasp while maintaining the aggressive character the S58 is known for.
Constructed from premium 304 stainless steel, each downpipe features precision TIG welding, smooth mandrel bends, CNC-machined flanges, and a fully integrated stainless steel heat shield to help reduce underhood temperatures and improve thermal management. The integrated resonators smooth out harsh exhaust frequencies, delivering a deeper, cleaner exhaust note without sacrificing the aggressive S58 sound.
By significantly reducing factory exhaust backpressure, the IRL MaxFlow Resonated Downpipes allow the turbochargers to spool faster, improve throttle response, and unlock additional horsepower and torque when paired with the proper ECU calibration. Integrated flex sections help absorb engine movement and reduce stress on the exhaust system, ensuring long-term durability under demanding conditions.
Whether paired with the factory exhaust or an aftermarket cat-back, the IRL MaxFlow Resonated Downpipes provide the perfect balance of performance, sound quality, and everyday drivability.
Features
- Designed specifically for BMW F97 X3M & F98 X4M (S58)
- Integrated resonators for a deeper, smoother exhaust tone
- Reduces unwanted rasp while maintaining an aggressive exhaust note
- Fully integrated stainless steel heat shields to reduce underhood temperatures
- Premium 304 stainless steel construction
- Precision TIG-welded with smooth mandrel-bent tubing
- CNC-machined flanges for precise OEM-style fitment
- Integrated flex sections to reduce vibration and exhaust stress
- Faster turbo spool and improved throttle response
- Increased horsepower and torque potential with proper tuning
- Direct bolt-on installation with no permanent modifications
Please Note: These downpipes are intended for off-road/racing use only and may trigger a Check Engine Light depending on your vehicle’s software calibration. Professional installation is strongly recommended.
Maximum Flow. Refined Sound. Engineered for Performance.
Fitment
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Returns
- Unused, uninstalled parts can be returned or exchanged within 30 days of the order date.
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- Returns can have up to a 20% restocking fee.
- Built-to-order and special-order items can't be returned or cancelled once production begins.
Shipping
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- Inspect parts within 10 days of delivery, and reach out regarding any damage or missing pieces.
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Warranty
- All parts retain the manufacturer's warranty.
- Warranty claims are subject to the manufacturer's approval.