SkidNation MX-5 NB Rear Traction Foundation Kit

While the NB chassis is a more refined evolution of the original MX-5, it suffers from the same inevitable reality: rubber components don’t stay precise forever. After two decades, the factory bushings have softened, and the rear alignment bolts have likely seized into the sleeves. This leads to “rear-steer” – a disconcerting sensation where the back of the car shifts independently of your steering input during mid-corner bumps or gear changes.

We’ve curated the Rear Traction Foundation Kit for the NB to eliminate that “squirmy” feeling. By replacing the compliant factory rubber with polyurethane and physically locking the alignment eccentrics in place, we’re creating a rear end that provides consistent, predictable grip.

SkidNation MX-5 NB Rear Traction Foundation Kit

What’s inside the kit:

• Rear Axle Polyurethane Bush Kit – A full set of bushings for the rear upper and lower control arms.
  • Eliminate Dynamic Deflection: Stops the rear wheels from toeing in or out under load, which is the primary cause of the NB’s “snap” oversteer.
  • Two Stiffness Options: 80 ShA for a balanced street car that maintains comfort, or 90 ShA for a dedicated track build where zero deflection is the priority.
  • Pro Tip: These bushings won’t “set” or perish like rubber, ensuring your alignment stays true for years of hard driving.

• High-Strength Rear Alignment Bolts – A complete set of eight eccentric bolts.
  • Top-Grade Hardware: High-tensile steel designed to hold your alignment settings even under the heavy vibrations of spirited driving.
  • Precision Adjustability: Essential for setting your camber and toe exactly where they need to be for your specific driving style.
  • Why it’s here: The factory NB bolts are notorious for seizing, often requiring a saw to remove. These fresh bolts make future adjustments effortless.

• SkidNation Alignment Locks – 4 mm zinc-plated steel plates that “key” into the subframe.
  • Mechanical Lock: These plates physically prevent the eccentric bolt from rotating, even if you clip a curb or hit a massive mid-corner bump.
  • H-Shape & D-Shape Plates: We provide both variations to ensure compatibility with our high-strength bolts (H-shape) and older OEM-style bolts (D-shape).
  • Pro Tip: This is the ultimate “set and forget” upgrade for track-day regulars who are tired of their alignment “walking” mid-session.

Key benefits

• Stable Cornering: Your alignment settings stay consistent mid-corner, leading to more predictable grip and faster exit speeds.
• Locked-In Alignment: No more “slipping” eccentrics after hitting rumble strips or potholes.
• Communicative Feedback: You’ll feel exactly what the rear tires are doing through the chassis.
• Easy Future Adjustments: Fresh, high-quality hardware makes future alignment checks simple and stress-free.
• Durability: Zinc-plated steel and high-grade PU mean this is likely the last time you’ll ever need to touch your rear suspension bushings.

This kit is for you if:

• Your NB feels “mushy” or disconnected during quick steering transitions.
• You’ve noticed your alignment specs have shifted after a track day or a spirited mountain run.
• You are refreshing your suspension and want a setup that feels “tighter” than the day it left the factory.
• You’ve upgraded to high-grip tires and need the suspension to handle the increased lateral forces.

This kit is NOT for you if:

• You want a completely silent, soft ride: Polyurethane (especially in 90 ShA) will transmit more road texture and mechanical noise than factory rubber.
• You have already converted to a full tubular subframe: In that case, your mounting points and bushings are already handled by custom geometry.

Fits all 1998-2005 models – NB/NBFL (Mk2/Mk2.5).

Shipping worldwide.