Suspension System

Recognizing worn suspension parts early prevents costly secondary damage to tires, brakes, and steering components. Here are the most common warning signs:

• Bumpy or harsh ride quality: If you feel every road imperfection that you used to glide over, your shock absorbers or struts have likely lost damping force. Worn suspension components allow excessive vertical wheel movement that the damper can no longer control.

• Excessive bouncing after bumps: Press down firmly on the front or rear of your parked vehicle and release. If the car bounces more than two or three times before settling, the shocks or struts need replacement. This is known as the bounce test and it takes less than 30 seconds.

• Nose diving when braking: If the front end dips aggressively when you apply the brakes, the front shocks have lost their ability to resist weight transfer. This can increase stopping distance by up to 20%, which is a serious safety concern in emergency braking situations.

• Uneven or accelerated tire wear: Cupping, feathering, or excessive wear on the inner or outer edges of your tires points to worn suspension parts that are no longer holding the wheel at the correct camber angle. Inspect your tire tread regularly for these patterns.

• Clunking, knocking, or squeaking noises: Unusual sounds over bumps or during cornering typically indicate loose or worn bushings, ball joints, or strut mounts. These noises mean metal components are making contact that should be cushioned by rubber or polyurethane.

• Vehicle pulling or drifting during cornering: If your car feels unstable or drifts to one side in turns, a damaged anti roll bar, worn control arm bushings, or degraded shocks could be the cause. This compromises your ability to maintain a controlled line through corners.

• Sagging or uneven ride height: If one corner of your vehicle sits lower than the others when parked on level ground, a coil spring may have broken or sagged. This imbalance stresses other suspension system parts and affects alignment.

If you notice any of these symptoms, browse our coilover suspension kits and wheel spacers to find the right replacement or upgrade for your vehicle. Professional inspection is recommended to confirm which specific components need attention.

Your suspension system is an interconnected network where every component affects the others. Understanding how these parts work together helps you make smarter upgrade decisions.

The system operates in four stages when your wheel encounters a road imperfection:

• Stage 1, Impact Absorption: The coil spring compresses to absorb the vertical kinetic energy from the bump. The spring rate, measured in kg/mm or lbs/in, determines how much force is required to compress the spring one inch. Softer rates absorb bumps more comfortably while stiffer rates reduce body roll during cornering.
• Stage 2, Motion Control: The shock absorber, also called a damper, slows the spring's rebound to prevent the car from bouncing like a pogo stick. Inside the damper, a piston forces hydraulic fluid through small valving orifices, converting kinetic energy into heat. Without a functioning damper, the spring would oscillate uncontrollably.
• Stage 3, Wheel Location: Control arms, trailing arms, and toe links keep the wheel moving in the correct path relative to the chassis. They control camber, caster, and toe angles throughout the suspension's travel range. Worn bushings at these pivot points allow unwanted wheel movement that throws off alignment.
• Stage 4, Body Stabilization: The anti roll bar, also known as a sway bar, connects both sides of the suspension to resist body lean during cornering. When one wheel compresses, the bar transfers force to the opposite side, keeping the vehicle flatter through turns.

Evil Energy coilover suspension kits integrate the spring and damper into a single height adjustable unit, which ensures the spring rate and damping force are properly matched from the factory. This is a significant advantage over mixing lowering springs with stock shocks, where the original damper cannot control the stiffer aftermarket spring. The twin tube design used in Evil Energy coilovers provides more suspension stroke for a given length compared to monotube designs, resulting in a smoother ride on daily driven vehicles. For truck and SUV owners, adding wheel spacers widens the track width, which works together with your suspension to improve lateral stability and reduce the feeling of tipping in corners.

Choosing the correct coilover suspension kit comes down to four factors. Getting any of these wrong means wasted money and a poor driving experience.

• Vehicle fitment: Coilovers are vehicle specific. You cannot install a kit designed for a Honda Civic on a Subaru WRX. Always confirm your exact year, make, model, and trim before ordering. Evil Energy coilovers are available for platforms including the VW Golf MK4, Mazda Miata MX5 NA/NB, Subaru WRX and WRX STI, Honda Fit, Hyundai Genesis, and Scion TC. Use the fitment table on each product page to verify compatibility.
• Driving goals: Daily drivers who want improved handling and adjustable stance should look for twin tube coilovers with moderate spring rates and damping adjustment. Weekend track enthusiasts may prefer stiffer spring rates for reduced body roll. Evil Energy coilovers use a twin tube design that balances daily comfort with occasional track capability, with spring rates set for both street and circuit use.
• Height adjustment range: All Evil Energy coilover kits offer a 2 to 4 inch lowering range. Consider how low you want to go and whether your daily driving routes include steep driveways, speed bumps, or rough roads that require additional ground clearance.
• Material and durability: Look for aluminum alloy bodies for corrosion resistance, chrome plated carbon steel piston rods for abrasion resistance, and heat treated high strength steel springs with anti corrosion coating. Evil Energy coilovers feature forged T6061 aluminum camber plates and springs with a fatigue life of 60,000+ cycles.

After installation, a professional four wheel alignment is required. Changing ride height alters camber and toe settings, and driving without realignment will cause rapid uneven tire wear. Professional installation is recommended because proper height adjustment and torque specifications require experience and specialized tools.

Evil Energy wheel spacers are engineered to meet or exceed factory safety standards when properly installed and maintained. Here is what makes them reliable for both daily driving and off-road conditions:

• Material strength: All Evil Energy wheel spacers are CNC machined from forged 6061 T6 aerospace grade aluminum, which is significantly stronger and more durable than cast aluminum alternatives. The forging process aligns the metal's grain structure, resulting in higher tensile strength and better resistance to cracking under load.
• Hardware quality: Each spacer kit includes 10.9 grade heat treated studs, which are the same quality grade used in many factory wheel mounting applications. These studs provide the clamping force necessary to keep the wheel securely attached to the hub under driving, braking, and cornering loads.
• Hubcentric design: Evil Energy hubcentric wheel spacers feature a machined lip that centers the spacer on the vehicle's hub bore, ensuring zero vibration at highway speeds. This is critical for safety and comfort, as non-hubcentric spacers rely solely on lug nuts for centering, which can lead to wheel imbalance and potential failure.
• Corrosion resistance: The black anodized surface treatment protects the aluminum from oxidation, road salt, and moisture. This is particularly important for vehicles driven in winter conditions or coastal areas where salt exposure accelerates corrosion on untreated metal surfaces.
• Vehicle coverage: Evil Energy wheel spacers are available for Chevrolet, Ford, GMC, Jeep, Ram, Toyota, Cadillac, and more, with bolt patterns including 5x4.5, 5x5, 5x115mm, 5x120mm, 5x120.65mm, 6x5.5, 6x135, and 6x139.7mm.

Installation requires proper torque specification, typically 85 to 90 ft-lbs for most applications, and the use of thread locker on the spacer studs. After installation, re-torque the lug nuts after the first 50 to 100 miles of driving to ensure everything has settled properly. If you hear any clicking or feel any vibration after installation, stop driving immediately and have the spacers inspected by a professional.

Installing suspension upgrades is trickier than regular DIY maintenance. Follow this guide to choose between self-installation and professional service easily.

Pre-installation

1. Verify part fitment: Match bolt pattern, spring rate and vehicle fitment info on product pages before unpacking. Only sealed, unused items qualify for returns.
2. Prepare required tools: Get a hydraulic jack, jack stands, socket wrench set, torque wrench, penetrating oil and spring compressor (for strut take-down). Improper tools lead to injury and part damage.
3. Stock baseline ride height: Measure the distance from wheel center to fender lip for later adjustment and result check.

During installation

1. Fasten parts strictly per manufacturer torque specs. Overtightening damages threads and components; undertightening causes loose parts while driving. Evil Energy lists torque data on relevant product pages.
2. Use all included new hardware. Stretch bolts and lock nuts are single-use parts that may fail if reused.
3. Photograph layouts of brake lines, ABS wires and sway bar links during disassembly for hassle-free reassembly.

Post-installation

1. Complete professional 4-wheel alignment right away. Ride height shifts alter camber, caster and toe, triggering uneven tire wear and poor handling without alignment. This step is mandatory.
2. Retorque all suspension fasteners after 50–100 miles of driving, as new parts settle and loosen during break-in.
3. Set adjustable coilover damping to the middle position initially. Test for days before fine-tuning. Excessively stiff damping reduces tire road contact and hurts handling.
4. Check for leaks, odd noises or abnormal performance in the first week. Light oil mist on shock shafts is normal; obvious dripping means faulty seals needing repair.