If you own an Infiniti G35 and want sharper handling, reduced body roll, and longer-lasting suspension components, upgrading to Energy Suspension polyurethane bushings is one of the most effective modifications you can make. Factory rubber bushings wear out over time, leading to vague steering, excessive play, and premature tire wear. Energy Suspension offers a range of polyurethane parts designed to replace these rubber components, providing a firmer, more responsive feel without sacrificing daily drivability. This guide covers the most common Energy Suspension G35 parts, their benefits, and how to select the right set for your specific needs.
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Why Choose Energy Suspension for Your G35?
Polyurethane vs. Rubber Bushings
The primary advantage of polyurethane over rubber is durability and performance. Rubber bushings soften and crack with age, especially under heat and stress. Polyurethane resists oil, grease, and ozone, and maintains its properties much longer. For a G35, which is often driven enthusiastically, this means consistent suspension geometry and reduced compliance.
Improved Handling Feel
Energy Suspension bushings are stiffer than rubber, which reduces unwanted movement in the suspension arms. This translates to more precise turn-in, better feedback through the steering wheel, and less squat under acceleration or dive under braking. The trade-off is a slight increase in road noise and vibration, but most enthusiasts find the trade worthwhile.
Easy Installation
Energy Suspension parts are designed as direct replacements for factory rubber bushings. They come in kit form with all necessary components, and many are pre-greased or require simple polyurethane grease for assembly. This makes them accessible for DIYers with basic tools.
Complete Set vs. Individual Components
Energy Suspension offers both full master kits and individual bushing sets for the G35. A master kit replaces every critical bushing in the front and rear suspension, giving you a comprehensive overhaul. This is ideal if your car has high mileage or you want a consistent feel throughout. Individual kits focus on specific areas, such as control arms, sway bars, or differential mounts, and are better for targeted upgrades or replacing only worn out parts.
Common G35 Energy Suspension Parts
Front Control Arm Bushings
The front lower control arm bushings are a common weak point. Energy Suspension offers a set that replaces both the front and rear lower control arm bushings. These eliminate excessive steering play and improve front-end stability during cornering.
Rear Trailing Arm Bushings
The rear trailing arm bushings control toe and camber under acceleration. Upgrading to polyurethane reduces wheel hop and provides more consistent traction, especially in a manual G35 with higher power.
Sway Bar Bushings
Sway bar bushings are exposed to constant twisting and often wear out quickly. Energy Suspension offers both 23mm and 27mm bushings to match the front and rear bars of the G35. Replacing them reduces body roll and minimizes clunking noises from worn rubber.
Differential Bushings
The G35’s differential mounts are prone to deflection, causing a noticeable thud when engaging the clutch or shifting aggressively. Polyurethane differential bushings tighten up the drivetrain, improving throttle response and reducing wheel hop.
Engine and Transmission Mounts
While not strictly suspension, Energy Suspension also makes motor and transmission mounts for the G35. These reduce engine movement and complement the suspension upgrades by keeping the driveline aligned.
Installation Considerations
Required Tools
Installing Energy Suspension bushings typically requires a press or a bushing removal tool for control arms. Sway bar bushings and differential mounts can be swapped with basic hand tools. You will also need a torque wrench and polyurethane grease (included with most kits).
Difficulty Level
Sway bar bushings are beginner-friendly. Control arm and differential bushings require more effort and may involve removing subframe components. If you are not experienced, having a shop press the old bushings out and new ones in can save time.
Lubrication and Seating
Energy Suspension supplies grease for assembly. Apply it generously to prevent squeaks. Once installed, torque the bolts to spec with the suspension loaded (car on the ground) to prevent premature wear.
How to Select the Right Parts for Your G35
Model Year Compatibility
The Infiniti G35 was produced from 2003 to 2008 with two generations (sedan/coupe). Most Energy Suspension parts specifically list compatibility with 2003-2007 models, but some cross-reference with the earlier 2005-2008 coupes. Always check the product description or use the manufacturer’s fitment guide.
Driving Style and Intended Use
If you daily drive your G35, a master kit with standard (non-race) durometer bushings offers a good balance of comfort and performance. If you track or autocross, look for the “race” or “high-performance” series which use stiffer formulations. For street use, avoid the hardest options as they transmit significant vibration.
Budget and Prioritization
A full master kit costs more upfront, but replacing worn rubber in stages can lead to uneven feel. If budget is tight, start with the front control arm and sway bar bushings, as these offer the most noticeable improvement. Differential and trailing arm bushings can follow later.
Final Recommendation
For most G35 owners, the best combination is a front control arm bushing set along with sway bar bushings in the correct sizes. This targets the weakest points in the suspension and delivers crisp handling without a radical change in ride quality. If your G35 has over 100,000 miles, consider a master kit to refresh all bushings at once. Avoid buying parts solely based on price; Energy Suspension’s reputation for quality and fitment is well established. Confirm compatibility with your specific year and drivetrain (RWD or AWD). With proper installation, these bushings will transform the feel of your G35 and last for years of spirited driving.