Short answer: a G35 to G37 conversion kit focuses on HID headlight ballast compatibility, engine and exhaust adaptations, and related components to help Infiniti owners cross-model while maintaining safety and performance. This guide highlights five relevant products that support headlight upgrades, HVAC retrofits, catalytic converter replacements, and general conversion needs. It is best for Infiniti G35/G37 owners planning light-to-moderate mid-model updates, or Nissan enthusiasts upgrading related components. The following buying table summarizes the top picks for quick reference.
| Product | Best For | Why It Stands Out |
|---|---|---|
| Headlight Ballast & D2S Bulb Set | G35/G37 HID upgrades | OEM-replacement style ballast and igniter with D2S bulb for stable lighting |
| AC Retrofit & Port Adapters Kit | R12/R134a retrofit | Comprehensive adapters and seals for refrigerant system conversion |
| Catalytic Converter Kit | Emission-legal upgrades | Direct-fit kit for 3.5L/3.7L engines with EPA compliance |
| Xenon HID Ballasts (Set) | Dual ballast replacement | Two ballast units with igniters for both headlights |
| R12 to R134a Conversion Kit (HVAC) | A/C system retrofit | Valve core tool, seals, and adapters to complete retrofit |
2X Headlight Ballast With Igniter & D2S Bulb
Features include a premium OEM replacement style ballast and igniter designed to mimic original equipment. The kit is compatible with Infiniti G35 and G37 models and other listed Nissan/Infiniti vehicles, providing stable start-up and consistent light output. Best for owners seeking to restore proper headlight performance without bespoke customization. A potential limitation is compatibility with non-listed variants; verify connector matches before purchase.
11 Pieces AC Retrofit Fitting Adapter Kit
This kit bundles high/low port adapters and valve core tools with seals, facilitating R12 to R134a retrofit work. It’s best for HVAC enthusiasts performing a complete refrigerant system refresh on G35/G37-era vehicles. Choose this if your project includes multiple adapters and you want a single purchase. A caution: ensure seals and cores fit your specific system to avoid leaks.
2PCS Catalytic Converter Kit for Infiniti G35/G37
Designed for Infiniti G35/G37 and compatible Nissan models, this kit supports 3.5L and 3.7L configurations with EPA compliance. It’s best for owners seeking a direct-fit replacement to maintain emission standards while upgrading exhaust flow. Better for those needing a practical, non-warned solution. A potential limitation is that it may not cover all sub-models; verify compatibility with your VIN before proceeding.
Set of 2 28474-89904 Xenon HID Ballasts
This set includes two HID ballasts with igniters and D2S bulbs, compatible with several Infiniti and Nissan models. Best for users replacing both headlights with OEM-like ballast-to-bulb integration. Choose this if you want a complete, balanced HID system restore. Limitation: confirm the exact OEM part number match for your vehicle year and trim to avoid misfit.
R12 to R134a Conversion Kit
Includes rubber seals and a valve core removal tool for R12 to R134a conversions. Best for owners performing HVAC retrofits on older G35/G37-era vehicles or other compatible cars. Choose this kit if your project requires robust sealing and core removal components. A caveat: ensure your system’s refrigerant compatibility and regulations in your area before proceeding.
Buying Guide
Key considerations when choosing a G35 to G37 conversion kit include compatibility, intended upgrade scope, and vehicle-specific needs. Consider these questions:
- What is my primary goal: headlight restoration, HVAC retrofit, or emissions upgrade?
- Is my vehicle year/model within the supported ranges listed for the kit?
- Do I need components for both sides or a single-side replacement?
- Are OEM-style parts required to preserve original appearance and function?
- Do I have the necessary tools to install the kit, or should I opt for a more complete package?
- What are potential safety considerations, such as high-voltage wiring in HID systems or refrigerant handling in HVAC upgrades?
Installation and Safety Tips
Always disconnect power sources before starting work on electrical or HVAC components. Use manufacturer-recommended torque settings for bolts and proper refrigerant handling practices to avoid leaks or injuries. Keep track of part numbers and cross-check with your exact model year and trim to prevent misfit parts. If uncertain, consult a professional technician who specializes in Infiniti/Nissan compatibility.
FAQs
- Q: Will these kits fit both G35 and G37 models? A: Many listed parts claim broad compatibility; verify your exact year and trim for fit.
- Q: Are these parts legal for street use? A: Most catalytic converter and HID ballast kits are sold for street use, but check local regulations regarding emissions components and headlight regulations.
- Q: Do I need special tools? A: Some kits include tools; others may require standard auto repair tools plus specialty items like valve core tools for HVAC.
- Q: Can I replace one side or both sides of the headlights with ballast kits? A: Some sets are designed for both sides; confirm product details before ordering.
- Q: Do these kits guarantee OEM performance? A: They are designed to match OEM form factors, but performance can vary by application and installation.
- Q: Is professional installation recommended? A: For HID, HVAC, and exhaust components, professional installation can help ensure proper function and safety.