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Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 19 - Jul 24
For Your Every Summer RSVP, with Code: SUMMER15
Description
JZ Upper Water Neck with Swirl PotThe ultimate cooling upgrade for street, drift, and high power JZ builds. Stop fighting trapped air, unstable temps, ugly plumbing, and cramped swap bays. Our Boost House JZ Upper Water Neck combines CFD engineered cooling tech with swap friendly packaging to fix the cooling issues JZ engines are known for. Key Benefits include CFD Engineered Integrated Swirl Pot High velocity internal swirl rapidly separates air from coolant. Eliminates steam pockets
The ultimate cooling upgrade for street, drift, and high-power JZ builds.
Stop fighting trapped air, unstable temps, ugly plumbing, and cramped swap bays.
Our Boost House JZ Upper Water Neck combines CFD-engineered cooling tech with swap-friendly packaging to fix the cooling issues JZ engines are known for.
Key Benefits include
🌀 CFD-Engineered Integrated Swirl Pot
- High-velocity internal swirl rapidly separates air from coolant.
- Eliminates steam pockets in the back of the head.
- More stable coolant temps under hard driving and long pulls.
❌ Thermostat Bypass Block-Off — Thermostat Delete Recommended
Our design blocks the OEM thermostat bypass port, which forces all coolant through the radiator instead of recirculating directly back into the pump.
➡️ This setup is designed to be used with a thermostat delete.
Using the bypass block-off with a closed thermostat can cause overheating because coolant cannot recirculate during warm-up.
Street Car Options:
We offer two ways to retain controlled bypass flow for street-driven cars:
-
Use the built-in calibrated bleed option:
The underside of the block-off includes a dimpled pilot hole.
You can fully drill this through to create a small, controlled bypass orifice. -
Drill the thermostat itself:
Use our included drill template to add a precise bleed hole through the thermostat.
This maintains some warm-up flow while keeping temperatures stable.
💧 +0.35L Extra Coolant Capacity
- Adds ~350 mL to the cooling system.
- More thermal mass = more stability during drift, track, or high-boost pulls.
🔧 Built for Single Turbo Conversions
- Integrated single turbo coolant outlet.
- No more blocking unused twin-turbo ports.
- Cleaner and more reliable coolant routing.
🔻 Low-Profile, Swap-Friendly Design
- Clears tight S-chassis, E36/46, and other transplant bays.
- Perfect for JZ swaps with minimal bonnet clearance.
- No bonnet spacing, cutting, or bracing modifications required.
🧰 Cleaner Bay + Fewer Leak Points
- Integrates the swirl pot, neck, and turbo feed into one compact housing.
- Eliminates tees, adapters, multiple hoses, and messy aftermarket plumbing.
- Reduced leak points and a far more professional look.
🏁 Track-Proven Cooling Stability
- Swirl pot sits at the highest point for effortless bleeding.
- Maintains coolant integrity under high G-forces and rapid temperature swings.
- Ideal for drift, time attack, drag, and high-power street builds.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy