Upgrade Your G87 M2 with H&R Suspension for Superior Handling

The G87 BMW M2 is already a formidable machine straight from the factory, but serious enthusiasts know that the right suspension upgrade can unlock its full potential. Installing an H&R suspension kit is one of the most effective modifications to sharpen turn-in, reduce body roll, and improve overall composure on both road and track. This comprehensive guide walks you through every step of the process, from preparation to final alignment, ensuring a professional-grade installation. Whether you choose H&R Street Performance coilovers or their progressive-rate lowering springs, the principles remain the same. The G87 M2’s chassis responds exceptionally well to a modest drop and stiffer damping, making this upgrade a favorite among driving purists.

Benefits of H&R Suspension on the G87 M2

H&R has been a leading name in performance suspension for decades, with a reputation for precision engineering and real-world results. On the G87 M2, their kits deliver several tangible improvements:

  • Reduced body roll during cornering, providing flatter handling and more confidence at the limit.
  • Lower center of gravity from a 1.0–1.5 inch drop, improving stability and reducing weight transfer under braking and acceleration.
  • Improved steering response with stiffer spring rates and optimized damping, giving the driver a more direct connection to the road.
  • Enhanced aesthetics with a more aggressive stance that closes the wheel gap without sacrificing daily usability.
  • Durability and longevity thanks to corrosion-resistant coatings and high-quality materials designed to withstand harsh conditions.

These benefits make H&R a go-to choice for G87 M2 owners seeking a balanced upgrade that retains OEM+ comfort while greatly improving dynamic capability.

Tools and Materials You’ll Need

Before starting, gather all necessary tools and safety equipment. Proper preparation prevents delays and ensures a clean installation. The following list covers everything required for the full front and rear suspension swap.

Essential Tools

  • Floor jack (2-ton minimum capacity)
  • Two heavy-duty jack stands
  • Wheel chocks
  • Metric socket set: 10mm, 13mm, 16mm, 18mm, 21mm (sockets and combination wrenches)
  • Torque wrench capable of 30–150 N·m (22–110 lb-ft)
  • Spring compressors (manual or hydraulic)
  • Breaker bar (½-inch drive) for stubborn bolts
  • Flathead and Phillips screwdrivers
  • Rubber mallet (for loosening tight components)
  • Pry bar or trim removal tools
  • Wire brush for cleaning threads
  • Thread-locking compound (Loctite 242 or equivalent)
  • Anti-seize lubricant
  • Safety glasses and mechanic’s gloves

Parts Supplied in the H&R Kit

Your H&R suspension kit should include:

  • Two front strut assemblies (or springs if using lowering springs only)
  • Two rear shock absorbers (or rear springs)
  • Four shock/strut mount bushings or hardware as required
  • Installation manual with torque specifications

If your kit does not include new top mounts, you will need to reuse the original BMW top mounts. Inspect them for wear and replace if necessary.

Preparation for Installation

Work in a well-lit, level space such as a garage or concrete driveway. Ensure the vehicle is cold and on level ground. Read through the entire H&R installation manual before touching any bolts. Note that some steps may vary slightly depending on whether you are installing a full coilover set versus lowering springs with OEM dampers. This guide assumes a full strut and shock replacement for maximum performance.

Safety First

Always use jack stands rated for the G87 M2’s curb weight (~3,700 lbs). Never rely on a jack alone. Wheel chocks behind the rear tires when lifting the front, and vice versa. Wear safety glasses when using spring compressors; a compressed spring can cause serious injury if released improperly.

Step 1: Lift and Secure the Vehicle

Using a floor jack, lift the front of the vehicle from the designated front jacking point (located behind the front bumper under the engine cradle). Place jack stands under the reinforced frame rails or factory lift points. Once the front is secure, repeat for the rear by jacking at the rear differential housing or designated rear jack point. Do not lift both ends simultaneously—work one axle at a time for stability.

Step 2: Remove the Wheels

With the vehicle securely on stands, loosen the lug nuts using a breaker bar before fully lifting the wheel off the ground. Once the wheel is free, remove the lug nuts and set the wheel aside. Inspect tire condition and wheel clearance; this is a good time to check for any uneven wear that might indicate pre-existing alignment issues.

Front Suspension Installation

The front suspension on the G87 M2 uses MacPherson strut architecture. Removing the strut requires access to the upper strut mount and the steering knuckle. Follow these steps carefully to avoid damaging the axle or brake lines.

Step 3: Remove the Stock Front Struts

Locate the strut assembly. Begin by disconnecting the sway bar end link from the strut using a 16mm socket. Next, remove the bolt securing the brake line bracket to the strut body. Use a flathead screwdriver to gently pry the ABS sensor wire bracket free. Then, support the strut with one hand while removing the two bolts connecting the strut to the steering knuckle (use a 21mm socket). Finally, under the hood, remove the three nuts (13mm) holding the strut mount to the chassis. Carefully lower the strut out from the wheel well. Take care not to overextend the axle shaft.

Step 4: Disassemble and Reassemble with H&R Components

Place the removed strut assembly on a clean workbench. If your kit includes new H&R struts with springs already assembled, skip to step 5. Otherwise, you must transfer the spring. Use spring compressors to compress the OEM spring until it can be removed safely. Remove the top nut (18mm) and carefully disassemble the top mount, bearing, and dust boot. Install the H&R spring on the H&R strut, ensuring the spring end sits in the lower perches correctly. Compress the new spring, then reassemble the top mount and bearing. Tighten the top nut to the manufacturer’s specification (typically 25–30 N·m). Always use new hardware where provided.

Step 5: Install H&R Front Struts

Guide the assembled strut back into the wheel well. First, align the top mount studs through the chassis holes and loosely install the three nuts. Next, attach the strut to the steering knuckle. Use a new bolt if supplied; otherwise, clean the original bolts and apply thread-locker. Torque the knuckle bolts to 100 N·m (74 lb-ft) plus an additional 90-degree turn, or follow H&R’s specific value. Reattach the sway bar end link and brake line bracket. Tighten all bolts to spec. Finally, torque the top mount nuts to 25 N·m (18 lb-ft).

Rear Suspension Installation

The rear suspension of the G87 M2 uses a multi-link setup with separate springs and shocks. Access is easier than the front, but careful attention to alignment is still essential.

Step 6: Remove the Stock Rear Shocks

From inside the trunk, remove the access covers behind the rear seat side panels to reach the upper shock mount bolts. Use a 16mm socket to remove the two upper nuts. Then, from under the car, remove the lower shock bolt (18mm) connecting the shock to the lower control arm. Pull the shock out from the bottom. Be prepared for some oil seepage if the shock is worn.

Step 7: Install H&R Rear Shocks

Install the new H&R shock by reversing removal. Extend the shock fully by hand, then insert it from the bottom. Guide the upper shaft through the chassis, loosely install the top nuts. Attach the lower eye to the control arm using the original bolt (or new hardware). Torque the lower bolt to 65 N·m (48 lb-ft) and the upper nuts to 22 N·m (16 lb-ft).

Step 8: Replace Rear Springs (If Applicable)

If your kit includes new H&R rear springs, you must remove the rear spring assembly. Use a spring compressor on the OEM spring if still under tension (the rear spring is usually unloaded when the suspension hangs at full droop). Remove the spring isolator and rubber seat. Install the H&R spring with the correct orientation (narrow end up). The spring should seat without force. Reinstall the isolator if reused. This step is straightforward, but ensure the spring is not binding against the chassis or control arm.

Final Steps After Installation

With all four corners completed, it’s time to reassemble and prepare the vehicle for the road. Do not skip the alignment step.

Step 9: Reattach the Wheels

Mount each wheel and hand-tighten the lug nuts. Do not fully tighten until the vehicle is on the ground. Use a torque wrench to tighten lug nuts in a star pattern once the car is on the ground. Torque to 140 N·m (103 lb-ft) for factory wheels.

Step 10: Lower the Vehicle

Remove the jack stands and carefully lower the vehicle using the jack. Let the suspension settle for a moment. Then, on a flat surface, roll the car forward and backward a few feet to allow the springs to seat. Complete the final lug nut torquing.

Step 11: Professional Alignment

A proper alignment is critical after any suspension change. The G87 M2’s geometry is sensitive to ride height changes. Take the car to a shop equipped with a modern alignment rack and provide the desired specifications. For a street-focused setup, start with factory camber settings and reduce toe to zero or slight toe-in for stability. For track use, consider slight negative camber (around -2.0 to -2.5 degrees front) for better cornering grip. Many alignment shops can reference H&R’s official recommendations for their kits.

Post-Installation Break-In Period

After installation, drive gently for the first 200–300 miles. This allows the new springs and shocks to settle and the bushings to take their final set. Avoid harsh bumps, full steering lock maneuvers, and heavy braking during this period. Recheck all bolts after 100 miles, especially the strut top nuts and lower knuckle bolts. If you notice any unusual noises or play, inspect immediately.

Performance Expectations and Handling Characteristics

Once bedded in, the H&R suspension transforms the G87 M2. You will notice a flatter cornering attitude with less weight transfer. The ride becomes firmer but remains compliant for daily driving, especially with the Street Performance coilovers that offer adjustable damping. Turn-in is sharper, and the car feels more planted through fast sweepers. On the track, lap times can improve by several seconds due to better tire contact and reduced body roll. However, the lowered stance may affect approach angles on steep driveways; take caution.

Maintenance and Longevity Tips

To maximize the life of your H&R suspension:

  • Clean regularly – Road salt and debris can accelerate corrosion. Wash the undercarriage periodically.
  • Inspect bushings – Check control arm bushings and sway bar links for wear after 20,000 miles.
  • Listen for noise – A clunk over bumps may indicate loose hardware.
  • Re-grease adjusters – If running coilovers with damping adjustment collars, apply grease to threads once a year to prevent seizing.

External Resources and Further Reading

For additional technical details and community feedback, consult these reliable sources:

  1. H&R Official Website – Product catalog and fitment guides for the G87 M2.
  2. BimmerPost G87 M2 Forum – Real-world installation experiences and alignment tips from fellow owners.
  3. BMW TIS (Technical Information System) – Official torque values and repair procedures for the G87 M2.
  4. Racing Dynamics Suspension Guide – General suspension tuning principles applicable to modified M2s.

Installing H&R suspension on your G87 M2 is a rewarding project that yields immediate improvements in handling and aesthetics. With careful execution and proper post-installation steps, you will enjoy a more responsive, engaging driving experience that complements the M2’s already impressive capabilities. Take your time, follow torque specs, and don’t skip the alignment. Your efforts will be rewarded every time you take a corner.