Lexus IS300 coilovers need to sharpen cornering response while maintaining daily-driver ride quality. Finding the best coilovers for lexus is300 can be tricky because you want performance without rattling your teeth on the way to work. This guide breaks down top picks, setup tips, and common mistakes so you can choose with confidence.
Your IS300 is a rear-wheel-drive legend, but stock suspension feels floaty and dated. Upgrading to coilovers transforms how the car handles, but the wrong set can ruin the experience. Let’s look at what actually works for street and track use.
Best Coilovers For Lexus Is300
This section covers the top coilover kits for the Lexus IS300 (XE10 chassis, 2001-2005). We focus on ride quality, adjustability, and real-world durability. Prices range from budget-friendly to race-ready.
1. Fortune Auto 500 Series
Fortune Auto 500 series are a favorite among IS300 owners. They offer a great balance of comfort and performance. The 24-way adjustable dampers let you dial in the ride.
- Pros: Smooth ride on low settings, good for daily driving, rebuildable
- Cons: Slightly pricier than entry-level options, limited camber adjustment
- Best for: Street use with occasional autocross
2. BC Racing BR Series
BC Racing BR coilovers are the most popular choice for the IS300. They are affordable and offer plenty of adjustability. Many owners run these for years without issues.
- Pros: Budget-friendly, 30-way damping adjustment, pillowball top mounts
- Cons: Ride can be harsh on rough roads, some report noise after a year
- Best for: Lowering on a budget, track days
3. Tein Flex Z
Tein Flex Z coilovers are engineered for street comfort. They use a special damper design to reduce harshness. They are a solid choice if you prioritize daily driving.
- Pros: Excellent ride quality, easy to install, durable coating
- Cons: Limited track performance, less adjustability than competitors
- Best for: Daily drivers who want a lower stance
4. KW Variant 3
KW Variant 3 coilovers are premium units for serious performance. They feature independent rebound and compression adjustment. This allows fine-tuning for grip and comfort.
- Pros: Top-tier handling, long lifespan, stainless steel construction
- Cons: Expensive, overkill for most street drivers
- Best for: Track-focused builds, canyon carving
5. Megan Racing EZ Street
Megan Racing EZ Street coilovers are an entry-level option. They are simple and effective for lowering. Expect a firmer ride than stock.
- Pros: Very affordable, easy height adjustment, good for beginners
- Cons: Harsh on bumps, limited damping adjustment
- Best for: Budget builds, stance setups
How To Choose The Right Coilovers
Picking the best coilovers for lexus is300 depends on your goals. Are you tracking the car or just cruising? Here is a simple breakdown.
Consider Your Driving Style
Think about how you use your IS300. Daily drivers need comfort. Track cars need stiffness. A mix of both is possible with adjustable dampers.
- Street only: Look for Tein Flex Z or Fortune Auto 500
- Street and track: BC Racing BR or KW V3
- Track only: KW V3 or high-end Fortune Auto
Check Spring Rates
Spring rates affect ride quality and handling. Softer springs (6-8 kg/mm) are better for daily driving. Stiffer springs (10-12 kg/mm) are for track use. Most kits come with balanced rates.
For the IS300, a common setup is 8 kg/mm front and 6 kg/mm rear. This reduces understeer while keeping the ride tolerable.
Look For Adjustable Dampers
Adjustable dampers let you change how the car responds. More clicks mean more fine-tuning. Aim for at least 24-way adjustment for versatility.
Consider Build Quality
Cheaper coilovers often leak or fail early. Look for stainless steel bodies and sealed units. Rebuildable dampers are a bonus for long-term use.
Installation Guide For Is300 Coilovers
Installing coilovers on your IS300 is a weekend job. You need basic tools and a jack. Follow these steps carefully.
Tools You Need
- Jack and jack stands
- Socket set (10mm, 12mm, 14mm, 17mm, 19mm)
- Torque wrench
- Spring compressor (for front struts)
- Penetrating oil (like WD-40)
Step-By-Step Installation
- Loosen the lug nuts on all four wheels. Jack up the car and place on stands.
- Remove the wheels. Start with the front.
- Disconnect the sway bar end links from the strut. Use penetrating oil if rusty.
- Remove the top hat nuts (3 nuts under the hood). Hold the strut from below.
- Remove the lower bolts connecting the strut to the knuckle. Pull the strut out.
- Compress the spring on the old strut. Transfer the top hat to the new coilover.
- Install the new coilover. Tighten the top hat nuts to spec (around 20 lb-ft).
- Reconnect the lower bolts and sway bar end links. Torque to spec (around 40 lb-ft).
- Repeat for the rear. Rear coilovers are easier—no spring compressor needed.
- Set ride height. Lower the car to the ground before tightening everything.
- Get an alignment immediately after installation.
Setting Up Your Coilovers
Proper setup is crucial for the best coilovers for lexus is300. Even the best kit performs poorly if not adjusted correctly.
Ride Height Adjustment
Lowering the IS300 improves handling but can cause rubbing. A good starting point is a 1.5-inch drop front and 1-inch drop rear. This gives a sporty look without scraping.
Measure from the fender to the center of the wheel. Aim for 13 inches front and 13.5 inches rear. Adjust the coilover collar to change height.
Damping Settings
Start with the dampers set to the middle of their range. For example, 12 clicks from full stiff on a 24-way system. Drive the car and adjust.
- Too bouncy: Soften the dampers (turn clockwise)
- Too harsh: Soften the dampers
- Too floaty: Stiffen the dampers (turn counterclockwise)
Camber And Toe
Coilovers often add negative camber. This improves cornering but wears tires. Set camber to -1.5 degrees front and -1.0 degrees rear for street use.
Toe should be zero or slight toe-in for stability. A professional alignment is mandatory after any suspension work.
Common Mistakes To Avoid
Many IS300 owners make errors when installing coilovers. Avoid these pitfalls for a better experience.
Not Pre-Loading The Spring
Some coilovers require spring pre-load. If you skip this, the ride will be bouncy. Follow the manufacturer’s instructions for pre-load settings.
Ignoring Bump Stops
Cutting bump stops too short can cause bottoming out. Leave at least 1 inch of bump stop material. This protects the damper from damage.
Skipping The Alignment
Driving without an alignment wears tires quickly. It also makes the car handle poorly. Always get an alignment within 50 miles of installation.
Over-Tightening Bolts
Torque specs are important. Over-tightening can strip threads or damage bushings. Use a torque wrench for all critical bolts.
Frequently Asked Questions
What Are The Best Coilovers For Lexus IS300 Daily Driving?
Tein Flex Z and Fortune Auto 500 series are top choices for daily driving. They offer good comfort and reliability. Both are easy to live with on rough roads.
Can I Install Coilovers On My IS300 Myself?
Yes, with basic tools and a weekend. The front requires a spring compressor. Follow a guide and take your time. If unsure, hire a professional.
How Much Does It Cost To Get Coilovers Installed On An IS300?
Professional installation costs $300 to $600. This includes labor and alignment. DIY installation saves money but needs careful work.
Do Coilovers Make The Lexus IS300 Ride Rough?
Some coilovers are harsh, especially budget ones. Higher-end kits like KW V3 or Fortune Auto offer a smooth ride. Proper damping adjustment helps a lot.
What Is The Best Coilover Brand For Track Use On An IS300?
KW Variant 3 and Fortune Auto 500 are excellent for track use. They provide precise control and durability. BC Racing BR is a good budget track option.
Final Thoughts On Is300 Coilovers
Upgrading your suspension is one of the best mods for the IS300. The best coilovers for lexus is300 transform the car from a comfortable cruiser into a sharp handler. Choose based on your budget and driving style.
Remember to install correctly and get an alignment. A well-set-up coilover system makes every drive more enjoyable. Take your time, do the research, and you will love the result.