Sport Cat Downpipes w/ HJS 200-Cell Catalytic Converter

Give your G8x M3/M4 more sound and power with these high-flow catted downpipes from Fabspeed Motorsport. Engineered in consultation with HJS Motorsport, they utilize the largest HJS catalytic converter that fits the chassis, ensuring maximum exhaust flow, reliability, and sound. These downpipes are constructed from CNC mandrel-bent 14-16 gauge T304L stainless steel, contributing to a lightweight design that saves 2 lbs compared to the factory system. The German-made HJS HD tri-metallic 200-cell catalytic converter is used for optimal performance and reliability. Laser scanned and CAD designed using Ametek Handyscan 700, they guarantee perfect OEM fitment and a simple bolt-on installation without the need for cutting or welding. On Fabspeed's in-house DynoJet, these downpipes achieved maximum gains of 23 ft-lbs of torque at 3,200 RPM and 20 WHP at 6,500 RPM (23 crank HP), with power gains observed throughout the entire power band. The Sport Cat Downpipe subtly increases exhaust volume and deceleration pops and burbles without introducing unwanted interior drone. A Fabspeed Lifetime Warranty backs all their performance products. This product contains a High-Flow Sport Catalytic Converter and is strictly intended for closed track events and off-road use only, as it is not California Air Resources Board or EPA certified. It fits all BMW M3 & M4 (G80/G82) sedan/coupe vehicles, including Competition Models worldwide (2021+), both RWD & AWD, as well as the BMW M2 (G87) (2023+).