Cat-Back Exhaust

Add power, sound and unique style to your BMW X5/X6 M with this cat-back system which produced gains of up to +20 horsepower and +33 lbs. x ft. torque as measured on our in-house dyno. Dual 3" to 2-1/2" mandrel-bent, brush finished 304 stainless steel tubing keeps exhaust flowing smoothly for power gains you can feel. Designed with a transverse, high flow muffler finished in high temp powder coating for long lasting good looks and unique sound. The factory exhaust valve motor is used to regulate the exhaust flow from a closed-valve, sporty tone to wide-open, aggressive, performance sound.

Additional Information

MACH Force-XP 3-1/2 IN 304 Stainless Steel Cat-Back Exhaust System w/ Black Tip BMW X5 M (F85) / X6 M (F86) 15-19 V8-4.4L (tt) S63

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

• 100 Percent CAD Designed Custom Factory Fitment
• Corrosion Resistance/Durability
• Evenly Distributes Exhaust Pulses
• Hassle Free Installation
• TIG Welded For Strength

Important Notice relating to US Domestic Market Trucks & Pickups

Many US-market trucks and pickups are available in multiple cab and bed-length configurations (e.g., Single Cab, Extended Cab, Double/Crew Cab, CrewMax, 5.5ft/6.5ft/8ft beds, etc.). Exhaust system fitment can vary between these chassis versions.

Where available, we list all compatible vehicles, cab types, and bed lengths in the product description. However, depending on your exact configuration, some systems may require optional extension/mid-pipes or minor modification for correct fitment.

Because of these variations, please carefully check your cab configuration and bed length before purchasing. If you are unsure, or if your vehicle has been modified, please reach out to a StreetFX agent.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Exhaust Systems, Mach Force XP, Cat-back, Dual In/Four Out, Stainless Steel, Brushed, Split Rear Exit, Polished Black Tips, BMW, 4.4L, Kit

aFe Mach Force XP exhaust systems are constructed of mandrel-bent stainless steel and come complete with free-flowing muffler(s), OE-style bayonet hangers, flanges, and band clamps, plus all hardware necessary for a hassle-free installation. Offered in single, dual, or quad muffler configurations, their smooth curves and large diameter tubes help reduce restriction and keep exhaust gas flowing smoothly for increased horsepower and torque.

Available in cat-back, axle-back, and downpipe-back designs, almost all Mach Force XP exhausts are direct bolt-on systems that require no cutting or drilling and include all necessary hardware for a hassle-free installation. Most also include wrinkle-black powdercoated or polished 304 stainless steel tip(s) with a laser-cut stainless steel aFe power badge. Select models have carbon fiber tips with CNC-machined laser-etched inserts. aFe Mach Force XP exhaust systems are an ideal combination of performance, fit, and value.

Additional features include:
• Fit a variety of light trucks and cars, including European models
• Available with 409 or 304 stainless tubing (varies by model)
• "Stepped design" models increase exhaust velocity creating a broader torque curve throughout the rpm range
• Straight-through, free-flowing stainless steel mufflers absorb high-pitch tones producing powerful sound
• Leak-free 360-degree sealing
• Stable pipe location in high-vibration and high-heat conditions
• Bayonet tips hold hanger bushings in place for an OE-style fit
• Several versions convert OE single exhaust to dual exhausts
• Where applicable, incorporates an exhaust valve that uses the OE exhaust valve motor (not included) to regulate exhaust flow
• Some systems use a unique resonance chamber to replace the OE muffler; produces a weight savings of up to 15 lbs.
• Hi-Tuck design of specific models provide extra ground clearance when using an aftermarket suspension kit

Note: Some aFe Mach Force XP systems are "Race Only" products solely for competition use. Their use is limited to closed-course racing that is formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, could be in violation of local, state, and federal laws.