4TH GEAR PERFORMANCE / DALLAS, GEORGIA

INFINITI G & Q SERVICE & PERFORMANCE

G35 · G37 · Q50 · Q60

Maintenance, diagnostics, repairs and carefully matched upgrades for your Infiniti. Start with the right platform, understand its condition and build a plan around your goals.

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FIND YOUR INFINITI. PLAN YOUR NEXT STEP.

Choose Your Platform

G35VQ35DE · VQ35HRG37VQ37VHRQ50VQ35HR · VQ37VHR · VR30DDTTQ60VR30DDTT

Explore G35

01 / 04OVERVIEW
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Infiniti G35 at 4th Gear Performance

01 / OVERVIEW

G35

G35 / VQ35 V6 / YEAR & BODY STYLE MATTER

A responsive V6 platform offered as a coupe and sedan. G35 engine and drivetrain configurations vary by year and model, including different VQ35 versions. A sound service plan starts by identifying the car you actually have.

VQ35 engine removed from the vehicle, with exhaust headers visible

02 / SERVICE NEEDS

START WITH A MECHANICAL BASELINE

Before recommending repairs or upgrades for your G35, we establish its configuration, previous changes, current condition, and which systems need attention.

Engine & fluid history — Confirm the VQ35 variant, review maintenance records and investigate leaks or oil-use concerns based on symptoms.

Age & wear — Evaluate cooling hoses, mounts, suspension joints and bushings where age or condition warrants.

Drivetrain & earlier work — Check transmission-specific concerns, brakes and previous installations before choosing parts.

Infiniti G35 sedan outdoors

03 / UPGRADE PATHS

BUILD TOWARD A DEFINED GOAL

A street refresh, a sharper performance car, and a larger build should not follow the same path. We match each change to how you want the car to perform and what the rest of the vehicle can support.

Street Refresh

Catch up on fluids, address leaks and worn mounts, then restore brake and suspension consistency.

Street Performance

Match cooling, brake, suspension and exhaust changes to the exact VQ35 version, body style and drivetrain.

High Performance

For a larger engine or forced-induction project, assess engine health, fuel supply, cooling and driveline support together.

Detail view of the Infiniti G35 in the workshop

04 / FAQ

G35 questions, answered.

Do all G35s use the same engine and parts?

No. VQ35 versions and other equipment vary across years and body styles. We confirm the installed engine and drivetrain before selecting service parts or upgrades.

I bought a modified G35. What should I bring?

Bring the model year, any parts list, service records and a description of concerns. We can assess condition and previous work before prioritizing the next steps.

Should I replace suspension parts because the car feels loose?

Start with an inspection. Tires, alignment, joints, bushings and dampers can affect the feel; the findings help avoid replacing parts that are not responsible.

Can I plan upgrades around daily driving?

Yes. Ride quality, braking, cooling and existing maintenance needs should shape the plan. The right combination depends on how you use the car and what you want to improve.

Explore G37

01 / 04OVERVIEW
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Infiniti G37 coupe at 4th Gear Performance

01 / OVERVIEW

G37

G37 / VQ37 V6 / CONFIRM BODY STYLE & DRIVETRAIN

The G37 combines naturally aspirated VQ37 power with a range of body styles and drivetrains. A reliable daily driver and a more demanding build both benefit from understanding service history, current condition and existing hardware.

VQ engine opened for gallery-gasket-related service work

02 / SERVICE NEEDS

START WITH A MECHANICAL BASELINE

Before recommending repairs or upgrades for your G37, we establish its configuration, previous changes, current condition, and which systems need attention.

Engine diagnosis — Review leaks, fluid condition and any oil-pressure concern. Internal oil-system work should follow diagnosis, not assumptions.

Transmission & driveline — Evaluate shifting, noises or hydraulic concerns according to the installed transmission and drivetrain.

Cooling & chassis — Inspect cooling performance, mounts, bushings and braking wear in the context of mileage and use.

Infiniti G37 engine bay with its VQ37 engine

03 / UPGRADE PATHS

BUILD TOWARD A DEFINED GOAL

A street refresh, a sharper performance car, and a larger build should not follow the same path. We match each change to how you want the car to perform and what the rest of the vehicle can support.

Street Refresh

Resolve relevant fluid and driveline concerns, refresh worn chassis components and establish a documented maintenance baseline.

Street Performance

Build on the VQ37 setup with coordinated cooling, brake, suspension and compatible exhaust improvements.

High Performance

Review engine condition, fuel delivery, heat management and transmission support before committing to a larger combination.

Red Infiniti G37

04 / FAQ

G37 questions, answered.

Does every G37 need gallery gasket work?

No. Year, service history, symptoms and test results determine whether internal oil-system work is appropriate. We diagnose the concern before recommending a repair.

Does a shifting concern mean I need a new transmission?

Not automatically. We first assess the symptoms, fluid condition, fault information and relevant systems. The findings determine whether service, repair or replacement is justified.

Do coupe, sedan and AWD G37s use the same upgrade parts?

Do not assume they do. Fitment can depend on body style, drivetrain and existing equipment. Confirm the exact configuration before ordering.

Where should I start with a recently purchased G37?

Start with records and a mechanical evaluation. Cooling, fluid condition, brakes, suspension and previous modifications can help establish sensible priorities.

Explore Q50

01 / 04OVERVIEW
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Red Infiniti Q50 sedan

01 / OVERVIEW

Q50

Q50 / ENGINE & DRIVETRAIN VARY BY YEAR

The Q50 brings a sports-sedan layout with several powertrain configurations across its model years, including VQ37 and later VR30 applications. Powertrain-specific service varies by model year and configuration; not every Q50 is twin-turbo.

VR30-equipped Infiniti Q50 on a lift during engine-out service

02 / SERVICE NEEDS

START WITH A MECHANICAL BASELINE

Before recommending repairs or upgrades for your Q50, we establish its configuration, previous changes, current condition, and which systems need attention.

Identify the powertrain — Confirm the year, engine, drivetrain and earlier work before interpreting symptoms or choosing parts.

Engine & cooling — Review leaks and cooling condition. Charge-air and turbo checks apply to the appropriate turbocharged configurations.

Transmission & chassis — Investigate shifting or driveline concerns and assess brake, tire and suspension wear.

VR30 engine with downpipes for a compatible VR30-equipped Infiniti Q50

03 / UPGRADE PATHS

BUILD TOWARD A DEFINED GOAL

A street refresh, a sharper performance car, and a larger build should not follow the same path. We match each change to how you want the car to perform and what the rest of the vehicle can support.

Street Refresh

Prioritize scheduled service, existing symptoms and worn brake or suspension components for the exact Q50 configuration.

Street Performance

For VR30-equipped cars, coordinate cooling and compatible supporting hardware with brakes, suspension and drivetrain needs; other engines need their own plan.

High Performance

Larger projects begin with engine identification and measured condition, then match fuel, heat management and transmission support to the proposed combination.

Black Infiniti Q50 sedan

04 / FAQ

Q50 questions, answered.

Is every Q50 powered by a VR30?

No. The Q50 used different powertrains across model years and configurations, including VQ37 and later VR30 versions. We confirm the exact engine before recommending work.

Do VQ37 and VR30 Q50s need the same service plan?

No. The naturally aspirated VQ37 and twin-turbo VR30 have different hardware and supporting systems. We match maintenance, diagnosis and parts selection to the installed engine.

My Q50 has a cooling or boost concern. Where do you start?

First confirm the powertrain and symptoms. On a turbocharged car, relevant cooling, charge-air and control-system checks can help identify the cause before replacing parts.

Can you inspect parts installed by a previous owner?

Yes. A parts list and records help us assess fitment, installation condition and supporting requirements. Priorities depend on the car and your goals.

Explore Q60

01 / 04OVERVIEW
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Blue later-generation Infiniti Q60 coupe

01 / OVERVIEW

Q60

Q60 / LATER 3.0T VR30 TWIN-TURBO COUPE

This section focuses on the later VR30-powered Q60 coupe shown here. Its twin-turbo V6, cooling hardware and drivetrain call for a coordinated plan. Earlier G37-based Q60 models and other engine configurations should be identified separately.

Later VR30-equipped Infiniti Q60 on a lift during engine-out work

02 / SERVICE NEEDS

START WITH A MECHANICAL BASELINE

Before recommending repairs or upgrades for your Q60, we establish its configuration, previous changes, current condition, and which systems need attention.

Turbo & charge-air systems — Evaluate leaks, connections and cooling condition where symptoms or planned work call for it.

Transmission & drivetrain — Review fluid history, shifting behavior and driveline concerns for the car’s configuration.

Use & installation quality — Check brake and suspension condition, tire wear and the compatibility of supporting hardware.

VR30 engine for a compatible later-generation Infiniti Q60

03 / UPGRADE PATHS

BUILD TOWARD A DEFINED GOAL

A street refresh, a sharper performance car, and a larger build should not follow the same path. We match each change to how you want the car to perform and what the rest of the vehicle can support.

Street Refresh

Keep fluids and scheduled maintenance current, resolve existing symptoms and refresh worn braking or chassis components.

Street Performance

Coordinate VR30 cooling and compatible supporting parts with suspension, braking and drivetrain requirements for road use.

High Performance

Plan the VR30 engine, fuel delivery, charge-air cooling, transmission and chassis as a complete system for a larger project.

Close view of the blue later-generation Infiniti Q60 coupe

04 / FAQ

Q60 questions, answered.

Does this section also describe the earlier Q60?

This section focuses on later VR30-powered Q60 coupes. Earlier G37-based Q60s and other engine configurations differ; share your year and engine so we can confirm the appropriate service plan.

Are Q50 and Q60 performance parts always interchangeable?

No. Shared engine families do not guarantee complete fitment. Body style, year, drivetrain and the specific part still need to be checked.

Should I add cooling hardware before other upgrades?

That depends on current temperatures, use and the planned combination. We assess the existing system and supporting requirements before recommending additional parts.

When would engine removal be necessary?

The diagnosis, access requirements and agreed scope determine the approach. Routine service does not automatically call for engine removal.

COMPLETE-CAR SERVICE

INFINITI G & Q SERVICE, FROM BASELINE TO BUILD.

Maintenance, diagnostics, repair, and performance work approached with the engine, cooling, drivetrain, brakes, suspension, and chassis in context.

  • Maintenance
  • Diagnostics
  • Engine repair
  • Cooling systems
  • Fuel systems
  • Turbo & exhaust where applicable
  • Suspension
  • Brakes
  • Clutch & drivetrain
  • Performance upgrades
  • Mechanical refresh
  • Transmission service & repair

DEFINE THE OUTCOME

WHAT DO YOU WANT THE CAR TO DO?

01

Maintain It

Keep the car healthy, reliable, and current on the service that protects it.

02

Refresh It

Correct age, wear, deferred maintenance, and previous work so the car feels right again.

03

Upgrade It

Improve performance with changes chosen to work with the car's current configuration.

04

Build It

Plan a larger combination by matching the performance goal with the fuel, cooling, drivetrain, braking, and chassis support it needs.

Infiniti G37 during transmission service in the workshop

BASELINE BEFORE UPGRADES

MATCH THE PLAN TO THE EXACT CAR.

G and Q models can differ significantly by year, engine, drivetrain, body style, and previous modifications. We identify the exact configuration and establish its condition before recommending service parts or performance hardware.

That means fewer assumptions, fewer unnecessary parts, and a plan built for the car you actually own.

Discuss your starting point
VR30 engine and supporting hardware for an appropriately equipped Infiniti Q model

PARTS THAT FIT THE PLAN

THE RIGHT PART SHOULD MAKE THE WHOLE CAR BETTER.

Good parts choices start with the exact vehicle, the hardware already installed, and what you're trying to accomplish. We use fitment and the larger plan to connect the part to the system around it.

SHOP INFINITI PARTS

HOW WE WORK

A CLEAR PATH FROM ASSESSMENT TO EXECUTION.

  1. 01

    TELL US ABOUT THE CAR

    What it is, what has been changed, what it's doing, and what you want from it.

  2. 02

    ESTABLISH THE BASELINE

    We verify the configuration, condition, service history, and previous work that matter to the job.

  3. 03

    DEFINE THE WORK

    We prioritize maintenance, repairs, and upgrades in the order that makes sense.

  4. 04

    EXECUTE THE PLAN

    We complete the agreed work with the supporting systems and end goal in mind.

WHY 4TH GEAR

PLATFORM KNOWLEDGE. WHOLE-CAR THINKING.

4th Gear combines a focused approach to Nissan, Infiniti, Supra, and modified JDM platforms with a systems-based approach to service and performance. We diagnose before replacing parts, account for the work that's already been done, and plan around how the engine, fuel, cooling, drivetrain, brakes, suspension, and chassis work together.

The goal isn't to put more parts on the car. It's to make the car better at what you want it to do.

YOUR INFINITI. YOUR GOALS. A PLAN THAT MAKES SENSE.

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