Why Upgrade to the BMW M Performance Exhaust for the F87 M2

The BMW M2 (F87 chassis) already delivers one of the most engaging driving experiences in its class, but the factory exhaust system leaves room for improvement in both sound character and weight reduction. The BMW M Performance Exhaust is engineered specifically for the F87 M2 by BMW's own performance division, ensuring perfect fitment, factory-backed durability, and a more aggressive exhaust note that complements the S55 or N55 engine's character.

This upgrade reduces backpressure for slight performance gains, drops significant weight compared to the stock system, and delivers a deeper, more resonant tone that transforms the driving experience without crossing into drone territory on the highway. For owners looking to personalize their M2 while maintaining OEM quality and warranty compatibility, the M Performance Exhaust represents one of the most rewarding modifications available.

Tools and Materials Required

Before beginning the installation, gather all necessary tools and components. Having everything within reach prevents unnecessary delays and ensures a smooth workflow.

Required Tools

  • Ratchet and socket set (8mm, 10mm, 13mm, 16mm, and 18mm sockets)
  • Torque wrench (capable of 15-80 Nm range)
  • Floor jack with padded lifting pad
  • Two jack stands (minimum 3-ton capacity)
  • Safety glasses and mechanic's gloves
  • PB Blaster or similar penetrating lubricant
  • Flathead screwdriver and trim removal tools
  • Rubber mallet (for stubborn hangers)
  • Breaker bar for stubborn bolts
  • Shop rags and a catch pan for any fluid drips
  • Battery terminal wrench (10mm)
  • Measuring tape for tip alignment

Required Components and Consumables

  • BMW M Performance Exhaust kit (genuine BMW part, not aftermarket replica)
  • New exhaust gaskets for the connection flanges (often included but verify)
  • High-temperature anti-seize compound for bolts
  • Exhaust hanger lubricant (silicone-based spray works well)
  • Threadlocker (medium strength, blue Loctite recommended)
  • New exhaust clamp nuts if not included with the kit

Preparation and Safety Considerations

Proper preparation is essential for a successful installation. Take the time to set up your workspace and understand what lies ahead before lifting the vehicle.

Workspace Setup

Choose a well-ventilated, level surface such as a garage floor or paved driveway. Ensure adequate lighting to see under the vehicle clearly. Allow at least three hours of uninterrupted time for the installation, though experienced DIYers may complete the job in two hours. Working with a helper significantly eases the exhaust alignment and hanger reinstallation steps.

Vehicle Preparation

  • Park the vehicle on a completely flat surface and engage the parking brake firmly.
  • Place wheel chocks behind the rear wheels for added security.
  • Disconnect the negative battery terminal using the 10mm wrench. This prevents any electrical shorts during work near the exhaust system and resets the engine management adaptation for the new exhaust.
  • Allow the exhaust system to cool completely if the vehicle was driven recently. Hot exhaust components can cause severe burns and make bolts more difficult to remove due to thermal expansion.
  • Remove the rear bumper lower trim panel if required for your specific M2 model year. Some F87 M2 variants require this for access to the exhaust tip area.

Lifting the Vehicle

Using the floor jack, lift the rear of the vehicle at the central rear jack point located behind the rear differential. Raise the vehicle sufficiently to allow comfortable access underneath, typically 18-24 inches of clearance. Place jack stands under the designated rear lift points on the chassis rails. Never rely solely on a jack to support the vehicle. Gently rock the vehicle to confirm stability before sliding underneath.

Removing the Stock Exhaust System

The factory exhaust removal is straightforward on the F87 M2, but some bolts may be tight due to heat cycling and corrosion. Work methodically to avoid damaging components.

Step 1: Apply Penetrating Lubricant

Spray PB Blaster or equivalent penetrating lubricant onto all exhaust flange bolts and hanger mounts. Allow the lubricant to soak for at least five minutes while you prepare tools and position the jack under the exhaust for support.

Step 2: Support the Stock Exhaust

Position the floor jack with a padded block or shop rag under the stock exhaust's center section. Raise the jack just enough to take the weight off the exhaust hangers. This prevents the exhaust from dropping suddenly when you remove the bolts.

Step 3: Remove the Exhaust Flange Bolts

Locate the two flanges where the exhaust connects to the downpipes or catalytic converters. Using the 16mm socket and breaker bar, loosen and remove the four bolts (two per side). Some M2 models use nuts on studs rather than bolts. Keep all hardware organized in a labeled container. If bolts are seized, apply additional penetrating lubricant and allow more soak time before applying force with the breaker bar.

Step 4: Disconnect the Exhaust Hangers

The stock exhaust is supported by four rubber hanger mounts along the center and rear sections. Working from front to rear, spray silicone lubricant onto each rubber hanger. Using a flathead screwdriver or trim tool, gently pry the metal hanger rods out of the rubber mounts. For stubborn mounts, a rubber mallet tapped on the hanger rod can help break them free. Never force the rubber mounts with excessive prying, as they can tear.

Step 5: Remove the Exhaust from the Vehicle

With all bolts removed and hangers disconnected, carefully lower the jack while a helper supports the exhaust. The stock system is heavy, so use caution to avoid dropping it or pinching fingers. Slide the exhaust out from under the vehicle and set it aside. Inspect the stock system for any unusual wear or damage that might indicate underlying issues with the vehicle.

Step 6: Clean the Flange Surfaces

Using a shop rag, thoroughly clean the mating surfaces on the downpipe flanges. Remove any old gasket material, carbon buildup, or debris. A smooth, clean surface ensures proper sealing with the new exhaust gaskets. If the flanges show signs of corrosion, use fine-grit sandpaper to restore a clean surface.

Installing the BMW M Performance Exhaust

The M Performance Exhaust is designed as a direct fit replacement, but careful alignment during installation ensures optimal fitment and prevents rattles or contact with the underbody.

Step 1: Install New Gaskets

Place the new exhaust gaskets onto the downpipe flanges. Ensure the gaskets are oriented correctly and centered on the flange. Most BMW exhaust gaskets have a specific orientation marked on the packaging. Applying a thin layer of anti-seize compound to the gasket surfaces can help prevent future seizing.

Step 2: Position the New Exhaust

With the help of an assistant, carefully position the M Performance Exhaust under the vehicle. The system is lighter than the stock exhaust, making handling easier. Align the front flanges with the downpipe flanges and guide the rear section toward the exhaust hanger mounts. Do not fully tighten any bolts at this stage.

Step 3: Connect the Flange Bolts

Insert the new bolts or nuts into the flanges. Hand-tighten them initially to allow for alignment adjustment. Apply a small amount of anti-seize compound to the bolt threads to prevent galling. Do not torque to spec yet. The system needs to be loose to allow for adjustment of the exhaust tip positioning.

Step 4: Install Exhaust Hangers

Working from the front of the system to the rear, insert each metal hanger rod into its corresponding rubber mount. Apply silicone lubricant to the rubber mounts for easier installation. Press the rod into the mount until it seats fully. Verify that each hanger is fully engaged and the rubber mount is not twisted. The exhaust should sit evenly without contacting the underbody or heat shields.

Step 5: Align the Exhaust Tips

This step significantly affects the final appearance. Measure the gap between each exhaust tip and the bumper trim cutout. The tips should be centered left-to-right and front-to-back, with equal spacing on both sides. Adjust the exhaust position by loosening and retightening the flange bolts and hanger positions as needed. The M Performance Exhaust tips should sit flush with or slightly recessed from the bumper trim, depending on your aesthetic preference. Take your time with alignment, as properly positioned tips make the installation look professional.

Step 6: Torque All Fasteners to Specification

Once the alignment is satisfactory, torque the flange bolts to the factory specification of 45 Nm (33 ft-lbs) using the torque wrench. Over-tightening can damage the flanges or gaskets, leading to exhaust leaks. Apply a drop of medium-strength threadlocker to the bolts before final tightening to prevent loosening from vibration.

Final Checks and System Verification

Before lowering the vehicle, perform a thorough inspection of the entire exhaust system to ensure everything is secure and properly positioned.

Clearance Inspection

Check all clearance points along the exhaust routing. Ensure the exhaust does not contact the following components:

  • Rear subframe and suspension components
  • Heat shields and underbody panels
  • Fuel lines and brake lines
  • Differential housing
  • Rear sway bar and end links

Rotate the rear wheels by hand to confirm there is no interference with the exhaust tips or any moving components. Any contact points can cause rattles, vibrations, or damage over time. If contact is detected, loosen the appropriate connections and reposition the exhaust.

Hardware Verification

Double-check that all bolts, nuts, and clamps are present and torqued correctly. Verify that the hanger rods are fully seated in the rubber mounts. Give the exhaust a gentle shake front to back to confirm it is firmly supported and does not move excessively.

Reconnect the Battery

With the installation complete and all tools removed from under the vehicle, reconnect the negative battery terminal. Tighten the terminal to 10 Nm (7 ft-lbs). If the vehicle has a battery registration system, no special procedure is required for an exhaust change, but the engine management will adapt to the new exhaust within a few drive cycles.

Initial Start-Up and Sound Check

The moment of truth is rewarding. Start the engine and allow it to idle for 30-60 seconds. The M Performance Exhaust will sound deeper and more aggressive than stock, especially during cold start. Listen carefully for any of the following issues:

  • Exhaust leaks: A hissing or ticking sound at the flange connections indicates a leak. If detected, allow the system to cool and retorque the flange bolts. If the leak persists, inspect the gasket for proper seating.
  • Rattles or contact noises: Metal-to-metal contact sounds under the vehicle indicate clearance issues. Rev the engine gently while stationary to identify problem areas.
  • Unusual vibrations: Excessive vibration transmitted through the chassis may indicate a hanger not fully seated or contact with the underbody.

Test Drive Procedure

Take the vehicle for a short test drive in a safe area. Vary engine speed and load conditions. Listen for exhaust drone at highway cruising speeds. The M Performance Exhaust is designed to minimize drone, but individual perception varies. Check the following during the drive:

  • Performance feel and throttle response
  • Exhaust sound under acceleration and deceleration
  • Tip alignment after the system settles from thermal expansion
  • No new warning lights or dashboard indicators

After the test drive, allow the system to cool and reinspect all connections and hangers while the system is at operating temperature. Retorque flange bolts if necessary, as thermal cycling can cause slight loosening.

Maintenance and Long-Term Care

The BMW M Performance Exhaust is built with high-quality stainless steel and TIG-welded construction, offering excellent corrosion resistance. However, following a few maintenance practices will keep it looking and performing optimally for years.

Cleaning the Exhaust Tips

The polished stainless steel or titanium tips require periodic cleaning to maintain their luster. Use a dedicated stainless steel cleaner or a mixture of mild soap and water applied with a microfiber cloth. Avoid abrasive cleaners or steel wool, as they can scratch the surface. For stubborn carbon deposits, a specialized exhaust tip cleaner works effectively. Clean the tips every two to four weeks to prevent buildup.

Inspection Schedule

During routine oil changes or tire rotations, inspect the exhaust system for any changes in fitment, loose hardware, or damage from road debris. Pay particular attention to the hanger mounts, which can degrade over time. Replace any cracked or excessively stretched rubber mounts promptly.

Performance Gains and Sound Characteristics

While the M Performance Exhaust is primarily a sound and weight reduction upgrade, it does offer measurable benefits. The system is approximately 40% lighter than the stock exhaust, reducing overall vehicle weight by roughly 8-10 pounds. Reduced backpressure from the freer-flowing design can contribute to slightly improved throttle response and a minor power increase, typically in the range of 3-5 horsepower, though this varies by vehicle and tuning state.

The sound profile is where this exhaust truly shines. At idle, the exhaust produces a deep, rumbling tone that is immediately more aggressive than stock. Under partial throttle, the note is refined and authoritative without being intrusive. At wide-open throttle, the exhaust delivers a raw, visceral sound that lets the engine's character speak. The cold start sequence is noticeably louder and more dramatic, a feature many enthusiasts appreciate.

Frequently Asked Questions

Will the M Performance Exhaust void my factory warranty?

The BMW M Performance Exhaust is a genuine BMW accessory designed for the F87 M2. When installed according to factory specifications, it does not void the vehicle warranty. However, any damage caused by improper installation or modification to other systems may not be covered.

Does the exhaust require ECU tuning or programming?

No. The M Performance Exhaust is a mechanical bolt-on upgrade that does not require any software changes. The engine management system adapts to the new exhaust naturally over time.

How does the sound compare to aftermarket exhaust systems?

Compared to most aftermarket systems, the M Performance Exhaust offers a refined yet aggressive tone that prioritizes sound quality over sheer volume. It eliminates the synthetic sound enhancement from the ASD (Active Sound Design) module while providing a natural, satisfying exhaust note. It is generally less loud than many aftermarket options, making it suitable for daily driving without attracting unwanted attention.

Can I install the exhaust myself, or should I use a professional?

This installation is suitable for an intermediate-level DIYer with basic mechanical skills and proper tools. The direct-fit design eliminates the need for welding or fabrication. However, a professional installation at a BMW dealership or independent shop ensures perfect alignment and torque specifications. Many owners choose to install it themselves and report a straightforward process taking two to three hours.

Additional Resources

For further technical details and community discussions, consult the following resources:

Conclusion

Installing the BMW M Performance Exhaust on your F87 M2 is one of the most satisfying upgrades you can perform. The combination of weight reduction, improved sound quality, and enhanced driving engagement transforms the character of the vehicle while maintaining the reliability and fitment that only a genuine BMW component can provide. By following this step-by-step guide, you can complete the installation with confidence and immediately enjoy the rewards of your work. Whether you are carving canyon roads or simply commuting, the new exhaust note will remind you at every start-up why the M2 remains one of the most celebrated driver's cars of its generation.