SKU: 16071019961

JZ Upper Water Neck with Swirl Pot

Sale price$360.00 Regular price$400.00
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 22 - Jul 27

Promo Codes Available:

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:

  1. 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.
  2. 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:
  1. 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
SKU: 16071019961

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R Nakashima
Waukegan, US
★★★★★ 5
It's easy to set and holds perfect time
Color: Brown/Digital/Brown
I'm very happy w/ this watch.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
M
Verified Purchase
martha grazioplene
Omaha, US
★★★★★ 2
No glow
Color: Brown/Digital/Brown
Where the glow . Dont buy if you need to see it .
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Reviewed in the United States on March 1, 2026
A
Verified Purchase
Alester Sewell
Birmingham, US
★★★★★ 5
Very comfortable good quality flash shipping
Color: Brown/Digital/Brown
Very comfortable good quality
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Reviewed in the United States on January 16, 2026
A
Verified Purchase
Amanda Holmes
Lowell, US
★★★★★ 4
Good watch
Color: Green/Digital/Green
Band pin fell out but I was able to fix it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 9, 2024
L
Verified Purchase
LittleShba
Houston, US
★★★★★ 5
The Perfect Digital Watch with all the Bells & Whistles!
Color: Black/Gray
I always buy this kind of watch, and so does my adult daughter. It has a timer, 3 alarm settings, push button light, easy to set, and other features that I don't use, like, track timers, Occasion settings, Beeps & Chimes, On or Off. I use it for timing my Laundry, taking pills, timing things in the kitchen. I just can't live without it! My daughter used it for timing on her Breast Feeding Schedule, so no matter what room she was in, or what she was doing, she would always hear that alarm!
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Reviewed in the United States on April 23, 2026

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