Upgrading the suspension on your NC Miata is one of the most effective ways to transform its handling, cornering ability, and overall driving enjoyment. The factory suspension, while competent, leaves room for improvement in terms of body roll control, ride compliance, and adjustability. Enter the Raceland coilover kit: a budget-friendly option that delivers a significant performance upgrade without breaking the bank. Designed specifically for the Mazda MX-5 NC, this kit offers adjustable ride height, damping, and spring preload, allowing you to dial in the perfect setup for street driving, autocross, or track days. In this comprehensive guide, we’ll walk you through the installation process, provide a detailed cost breakdown, and discuss the performance improvements you can expect. We’ll also cover essential post-installation steps like alignment and tuning to ensure you get the most out of your new suspension.

What’s in the Raceland Coilover Kit?

Before you start wrenching, it’s important to understand exactly what comes in the box. The Raceland coilover kit for the NC Miata includes all the components necessary to replace the entire strut and spring assembly at all four corners. Here’s what you’ll find:

  • Four Coilover Shocks – These are the core of the kit. Each shock features a threaded body that allows you to adjust ride height by spinning the lower spring perch. The shocks are nitrogen-charged and offer 30 levels of damping adjustment (click-type), letting you fine-tune compression and rebound for your driving style.
  • Adjustable Spring Perches – These threaded rings sit on the shock body and support the spring. You can raise or lower the perch to change ride height without affecting preload (on the NC, the spring sits on the perch and is compressed by the top hat).
  • Replacement Top Hats – The kit includes new top hats for the front and rear. The front top hats have a spherical bearing (pillow ball) for improved steering precision, while the rear uses a reinforced rubber bushing to preserve some street comfort.
  • Hardware Kit – You’ll get new nuts, bolts, and washers for mounting the coilovers. Brake line brackets and zip ties for securing ABS sensor wires are typically included as well.
  • Springs – The kit comes with matched springs (usually 7 kg/mm front and 5 kg/mm rear for the NC). These rates are a significant step up from stock and provide a firm but still streetable ride.

It’s worth noting that Raceland offers different spring rate options for the NC depending on your use case. The standard kit is great for daily driving and occasional autocross, but if you’re building a dedicated track car, you might want to inquire about stiffer spring options.

Tools and Materials Needed

Installing a coilover kit is a reasonably advanced DIY job, but with the right tools and patience, it can be done in a weekend. Here’s a complete list of what you’ll need:

  • Socket Set – Metric sockets from 10mm to 21mm. A 3/8” drive set is fine, but you’ll also need a 1/2” drive for suspension bolts (e.g., 17mm and 21mm).
  • Wrench Set – Combination wrenches in the same metric sizes. A 14mm and 17mm are most common for suspension bolts.
  • Spring Compressor – Essential for safely disassembling the factory struts. You’ll need a pair of manual spring compressors or a hydraulic unit. Never attempt to remove springs without one.
  • Jack and Jack Stands – A low-profile floor jack and at least two sturdy jack stands. You’ll need to lift the car high enough to remove the wheels and work under the suspension.
  • Pliers – Needle-nose pliers for removing cotter pins and hose clamp pliers for brake lines.
  • Torque Wrench – A 1/2” drive torque wrench capable of 20-150 ft-lbs. Critical for tightening suspension bolts to spec.
  • Pry Bar or Dead Blow Hammer – For separating stubborn suspension components (e.g., sway bar end links).
  • Safety Goggles and Gloves – Always protect your eyes and hands when working under a car.
  • Penetrating Oil – Like PB Blaster or WD-40. Corrosion on suspension bolts is common; spray them a day before starting.
  • Breaker Bar – A 1/2” drive breaker bar (18” minimum) for loosening tight bolts, especially the lower strut-to-knuckle bolts.
  • Chisel or Flathead Screwdriver – To pry apart rusted connections.

If you don’t already own a spring compressor or torque wrench, you can rent them from most auto parts stores for a small fee. The total investment in tools if buying new is roughly $100–$250, which we’ll include in the cost breakdown.

Cost Breakdown

Understanding the total cost of this upgrade helps you budget accurately. Below is a detailed breakdown of typical expenses for installing a Raceland coilover kit on an NC Miata. Prices may vary based on your location, shipping, and whether you choose professional installation.

  • Raceland Coilover Kit: $899 (varies between $800 and $1,000 depending on sales and spring rates)
  • Tools (if not already owned): $150 on average (spring compressor rental $30, torque wrench $40, sockets and wrenches $80)
  • Professional Labor (optional): $300–$500 (most independent shops charge 4-6 hours at $75–$100/hour)
  • Alignment: $100–$150 (a four-wheel alignment is mandatory after any suspension install)
  • Shipping & Tax: $50–$100 (the kit is heavy and ships from Raceland’s California warehouse)
  • Miscellaneous: $20 (penetrating oil, zip ties, brake cleaner)

Total Estimated Cost: $1,200–$1,700 if you DIY, or $1,500–$2,100 if you pay for professional installation. Compared to other coilover kits for the NC (like Ohlins, KW, or Fox), which run $1,500–$2,500 just for the parts, the Raceland kit is a very affordable way to get adjustable suspension.

Step-by-Step Installation Guide

Preparation and Safety

Work on a level surface, ideally a garage floor. Chock the rear wheels (or front if working on the rear). Loosen the lug nuts on all four wheels before lifting the car. Use a jack to raise the vehicle frame at the pinch welds, then place jack stands under the frame rails (just behind the front wheels and just ahead of the rear wheels for the front and rear respectively). Never rely on a jack alone.

Front Coilover Removal

  1. Remove the wheel. Set it aside.
  2. Disconnect the sway bar end link. Use a 14mm socket to remove the nut and bolt. A pry bar may be needed if the link is seized.
  3. Unclip the brake line and ABS sensor wire. They are usually attached to the strut body with plastic clips. Also remove the small bracket that holds the brake hose to the strut (use a 10mm socket).
  4. Remove the lower strut-to-knuckle bolts. There are two bolts (17mm) holding the strut to the steering knuckle. Loosen them with a breaker bar. You do not need to remove the knuckle from the lower control arm. On some NCs, the bolts may be accessibly only after slightly pulling the knuckle outward. Use a jack under the lower control arm to relieve pressure if needed.
  5. Remove the upper strut mount nuts. Inside the engine bay, you’ll see three 14mm nuts at the top of the strut tower. Remove them with a wrench. Hold the strut from below to prevent it from falling. The strut will now be free.
  6. Remove the strut assembly by tilting and pulling it out through the wheel well.

Disassembling the Factory Strut

  1. Place the factory strut in a spring compressor. Compress the spring fully before loosening the top hat nut.
  2. Use a hex key (often 6mm) to hold the shock shaft and a 19mm wrench to loosen the top nut. Remove the nut, top hat, spring seat, bump stop, and finally the spring.
  3. Set aside the factory hardware if you plan to reuse it (though the Raceland kit includes new top hats and hardware).

Assembling the Raceland Coilover

  1. Install the Raceland spring onto the shock body with the adjustment collar at the desired height. For a first setup, start with the collar about halfway up the threads (this usually gives a 1–1.5” drop).
  2. Place the top hat over the shock shaft (ensure the bearing or bushing is oriented correctly). Tighten the top nut to the Raceland-specified torque (usually 35–45 ft-lbs). Use a torque wrench.
  3. Confirm that the spring is seated properly and that the dampener adjustment knob is accessible (on the NC, the knob faces inward or outward; adjust as needed).

Installing the Front Coilover

  1. Insert the assembled coilover into the strut tower from below. Guide the shaft through the opening and align the three studs with the holes in the chassis.
  2. Hand-tighten the three top nuts (14mm) from the engine bay side.
  3. Reattach the lower strut-to-knuckle bolts. Use a jack to lift the lower control arm slightly if needed to align the bolt holes. Tighten both bolts to 80 ft-lbs (check Raceland’s manual; some recommend 80–100 ft-lbs).
  4. Reconnect the sway bar end link and tighten to 35 ft-lbs.
  5. Reattach the brake line bracket and ABS sensor clips. Make sure the brake line is not twisted or rubbing on any component.
  6. Double-check all bolts are tight. Repeat for the other front side.

Rear Coilover Removal and Installation

The rear suspension is simpler because the shock and spring are separate from the knuckle. The NC has a multi-link rear suspension.

  1. Remove the wheel.
  2. Disconnect the sway bar end link (14mm).
  3. Remove the lower shock bolt (17mm) that connects the shock to the lower control arm.
  4. Remove the upper shock nut (inside the trunk area, behind the trim). You may need to remove some carpet clips to access the top mount.
  5. Pull the shock out from below.
  6. Disassemble the factory shock using a spring compressor (the rear spring is separate from the shock; you don’t need to compress it if you’re not reusing the spring).
  7. Assemble the Raceland rear coilover similarly to the front, noting that the rear top hat uses a rubber bushing rather than a spherical bearing.
  8. Install the new coilover by first inserting the top mounting into the chassis hole, then bolting the lower mount to the control arm. Torque the lower bolt to 80 ft-lbs and the upper nut to 30 ft-lbs.
  9. Reattach the sway bar end link.
  10. Repeat for the other rear side.

Final Steps

  1. With all four coilovers installed, lower the car to the ground (do not tighten the control arm bolts yet if you disconnected them – but in our procedure we didn’t, so you’re fine). Bounce the suspension a few times to settle the springs.
  2. Check and adjust ride height. Measure from the center of the wheel to the fender lip. A typical drop is 13” front and 13.5” rear. Adjust by turning the lower spring perch.
  3. Torque all bolts to the manufacturer’s specifications. Important: re-torque the lower control arm bolts (if removed) and sway bar end links with the suspension loaded (car on the ground).
  4. Take the car for a short test drive around the block to check for noises, clunks, or misalignment. If everything sounds good, schedule a professional alignment.

Performance Improvements

After installing the Raceland coilover kit, the difference in handling is immediate and dramatic. Here are the key performance improvements you can expect:

  • Reduced Body Roll – The stiffer springs (7kg front, 5kg rear) drastically reduce the Miata’s notorious body roll in corners. The car feels flatter and more planted during aggressive turns, inspiring confidence to push harder.
  • Improved Cornering Stability – With adjustable damping, you can fine-tune the response. For street driving, set the damping 10–15 clicks from full soft. For autocross, try 5–8 clicks. The car becomes much more responsive to steering inputs and maintains grip better through sweepers.
  • Adjustable Ride Height – You can lower the car anywhere from 1 to 3 inches. Lowering the center of gravity improves stability and reduces weight transfer during acceleration and braking. Many NC owners choose a 1.5-inch drop for both looks and performance.
  • Better Steering Feedback – The front spherical bearing top hats provide a more direct connection to the road, eliminating the slop felt with rubber bushings. You’ll feel bumps and camber changes more clearly through the steering wheel.
  • Improved Ride Quality (with proper tuning) – Contrary to popular belief, coilovers don’t have to be harsh. The Raceland kit’s 30-way damping allows you to set a comfortable ride for daily use while still having track-ready stiffness. At the soft end, the ride is firmer than stock but not jarring; at the stiff end, it’s suitable for smooth surfaces and competitive driving.

On the track, the reduced body roll and improved damping translate to faster lap times because you can carry more speed through corners. On the street, the car feels more connected and enjoyable to drive, especially on twisty backroads.

Tuning and Alignment After Installation

To maximize the performance of your Raceland coilovers, a proper alignment is non-negotiable. The NC Miata benefits from a performance alignment with increased negative camber. Here are typical specs for a street/track dual-purpose NC:

  • Front Camber: -1.5 to -2.0 degrees
  • Rear Camber: -1.0 to -1.5 degrees
  • Front Toe: 0 to 1/16” total toe in
  • Rear Toe: 1/8” total toe in
  • Caster: As much as possible (NC allows 5-6 degrees)

Have the alignment shop set the ride height first (if you haven’t already) and then perform the alignment with you in the driver’s seat (often called “driver weight ballast”). This compensates for your weight and ensures the suspension geometry is correct. Expect to pay around $100–$150 for a four-wheel alignment. Some specialty Miata shops can adjust camber with aftermarket eccentric bolts if needed, but the NC has decent adjustability from factory.

Potential Challenges and Tips

  • Rusted Bolts – The lower strut-to-knuckle bolts on the front are notorious for seizing. Spray them with penetrating oil a day before. If they are stuck, use a breaker bar and consider applying heat (carefully) with a torch. Impact wrench also helps.
  • Sway Bar End Links – You might find it easier to unbolt the sway bar from the frame to gain more room. A 14mm bolt attaches the sway bar bushing bracket; removal allows the bar to drop down.
  • Spherical Bearing Noise – The front pillow ball top hats can transmit more road noise and vibration. If you prioritize comfort over precision, you can swap them for rubber top hats, but then you lose some steering feel.
  • Ride Height Adjustment – After a few hundred miles, the springs will settle. Re-check ride height and adjust as needed. It’s normal to lower another 1/4 inch after break-in.
  • Dampener Adjustment – Use the same number of clicks on all four corners initially. Fine-tune by stiffness from there. Keep a log of settings so you can return to a baseline.

For additional resources, check out the Raceland official website for product details and installation manuals. The Miata.net forum has a wealth of user experiences and tuning advice for Raceland coilovers. For performance alignment specs, Flyin' Miata’s alignment guide is a reliable reference.

Conclusion

Installing a Raceland coilover kit on your NC Miata is a highly rewarding project that dramatically improves the car’s handling and driving enjoyment. With the right tools, a systematic approach, and attention to detail, you can complete the installation over a weekend and save on labor costs. The total investment—around $1,200 to $1,700 including the kit and alignment—is reasonable for the performance gains. You’ll get adjustable ride height, damping, and cornering stability that transform the Miata from a fun roadster into a serious performance machine. Whether you’re carving canyon roads, competing in autocross, or simply want a more aggressive stance, the Raceland coilover kit delivers exceptional value. Follow this guide, take your time, and enjoy the improved drive.