LS3 350Z Finally Hits the Street – Custom Exhaust Flyby + Cooling System Fixed

The LS3-swapped 350Z is finally driving again — and sounding incredible.

In this video, I fix a major issue with the cooling system by redesigning the lower radiator hose. The old setup trapped air and caused temps to climb past 220°F at idle. After replacing the hose and bleeding the system, I idle the car up to temperature and put the new fan shroud + Proform brushless fans to the test. They kicked on at 200°F and instantly dropped temps to 190°F, holding steady.

This video ends with the first street drive in almost 2 years — complete with dual camera angles of the custom TIG-welded 3" exhaust flyby. The new brakes (Alaria Tech dual master cylinder setup) also got their first test and performed perfectly.

🧰 Cooling System Parts:
• Zerex Coolant: https://www.summitracing.com/parts/ZR...
• AFCO Circle Track Radiator: https://www.summitracing.com/parts/AF...
• Proform Brushless Fans: https://www.summitracing.com/parts/PR...
• Chase Bays Remote Fill Neck: https://www.chasebays.com/products/re...

📺 Related Videos:
• [Custom Fan Shroud Build & Install](   • Brushless Dual Fan Shroud Fabrication – LS...  )
• [Dual 3” Exhaust Build with X-Pipe](   • Custom Dual 3” Exhaust for LS3 350Z | Home...  )
• [Brake Master Cylinder Upgrade](   • Installing the ALARIA Dual Master Kit on M...  )

🔧 Car Details:
• 2003 Nissan 350Z
• LS3 418ci stroker, 600whp
• LOJ Swap Kit
• Holley Terminator X ECU
• TIG-welded stainless dual exhaust

💬 Drop a comment if you’ve had cooling system headaches or want more info on the fan wiring. Don’t forget to like + subscribe if you're into DIY track builds!