Cat-Back Exhaust

aFe is proud to introduce the aFe dual cat-back exhaust system. In recent testing this aFe cat-back exhaust system produced 34 horsepower and 43 lbs. x ft. of torque, furthermore, weighs 20 lbs. less than the stock exhaust. With the iconic 911 already a well-engineered performance driving machine, aFe developed the perfect balance of pure, race-inspired performance while ensuring that perfect sound decibel and exhaust note creates the ultimate driving experience. Starting with a CAD X-Pipe, aFe spent countless hours of R&D to ensure that the volume, flow and balance was no less than perfect. Also, aFes unique brushed finish step mid pipe design unleashes all available power and creates a broad and exciting power band. Included are dual 304 stainless steel light-weight race mufflers and resonators, this straight through design eliminates any restriction and optimizes maximum power and performance with no compromise. Available with 3-1/2 IN polished 304 stainless steel quad tips and CNC-Machined laser-etched tip inserts, this system is hand-crafted and TIG-welded for a perfect, precise fit and 100% complete bolt-on installation. No modifications necessary.

Additional Information

MACH Force-Xp 2-1/2 IN 304 Stainless Steel Cat-Back Exhaust w/Carbon Fiber Tips Porsche 911 Carrera (991) 12-16 H6-3.8L

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% Hand TIG Welded
• 3-1/2 IN Light Weight Polished Laser-Etched Quad Tips
• 304 Stainless Steel Tubing
• Hassle Free Installation
• Light Weight Dual 304 Stainless Steel Mufflers
• Race Proven Spring Hook Design
• Race-Inspired Dual Resonators
• Step Mid-Pipe Design
• Weight 20 lbs. Less Than Stock

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, Brushed, Split Rear Exit, Carbon Fiber/Polished Tips, Porsche, 3.4L, 3.8L, 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.