SKU: 22160713326

COOLANT EXPANSION TANK, ELISE/EXIGE, OEM LOCATION

Sale price$137.67 Regular price$152.97
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 13 - Jul 18

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

COOLANT EXPANSION TANK, ELISE/EXIGE, OEM LOCATIONThe Radium remote mounted coolant header tank is commonly required for custom Lotus applications such as engine swaps, turbocharger kits, etc. where the OEM expansion tank is no longer in an ideal location. The main tank is a 2 piece design constructed of CNC 6061 billet aluminum, as shown below. The two halves are bolted together along with a CNC billet aluminum cap receiver which mates to any standard 32mm "Type A" style pressure cap. Coolant header

The Radium remote mounted coolant header tank is commonly required for custom Lotus applications such as engine swaps, turbocharger kits, etc. where the OEM expansion tank is no longer in an ideal location.

The main tank is a 2-piece design constructed of CNC 6061 billet aluminum, as shown below. The two halves are bolted together along with a CNC billet aluminum cap receiver which mates to any standard 32mm "Type-A" style pressure cap.

Coolant header tanks are necessary for applications that utilize a low mounted radiator, such as a V-Mount, for proper air bleeding.

The Radium Engineering tank also has an internal swirl feature, as shown below. Hot pressurized coolant from the cylinder head is sent into the vortex chamber's inlet tangentially and accelerated to a high rate of rotation. This is an old hot rod trick to help aid in deaerating the system.


The Radium Coolant Expansion Swirl Tank features three ports that include -6AN male adapter fittings (not tapered pipe threads) for a positive seal. The lower ports are machined with 10AN ORB threads. For a list of other 10AN ORB adapter fittings that can be used, go HERE. The side port is machined with 6AN ORB threads. For a list of other 6AN ORB adapter fittings that can be used.
Includes:
-Billet Aluminum Coolant Tank Anodized Black
-Aluminum 6AN Male Adapter Fittings Anodized Black
-Nickel Plated Sight Tube Fittings
-Billet Aluminum 32mm Pressure Cap Receiver
-Billet Aluminum Pressure Bleed Nipple
-Laser Cut Aluminum Firewall Mounting Bracket Powder Coated Black
-Aluminum and Stainless Steel Mounting Hardware

Options:
Pressure Caps
The optional Radium pressure caps (sold separately) allow the user to select a range of pressure. The purpose of a high pressure cap is to increase the boiling point in the cooling system providing improved cooling efficiency. Each cap is manufactured from stainless steel with a race proven high pressure valve. This is something to consider when tracking the vehicle in extreme conditions.

The OEM Lotus pressure cap is 1.1 Bar.

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: 22160713326

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.0 ★★★★★
Based on 1138 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
J
Verified Purchase
James Collier
Charlottesville, US
★★★★★ 3
Good but misleading size
Size: 3Pack of 5 Tier (Not included planks)
Sturdy set for shelving. However dimensions are misleading. Not sure if they sent the incorrect size but the vertical distance between shelves was 11” and that’s without the shelving installed
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026
S
Verified Purchase
Sara
Louisville, US
★★★★★ 5
Worked for pantry
Size: 3Pack of 5 Tier (Not included planks), Size: 3Pack of 5 Tier (Not included planks)
These turned out perfect t for a pantry. Just fyi get better dry wall anchors and you’re golden! Definitely takes two people to put up tho!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 14, 2026
W
Verified Purchase
waltS
Boise, US
★★★★★ 5
Great reference resource!
Format: Paperback
Phenomenal field guide in a quick and easy reference style. Especially for the austere environment without the usual diagnostic tools and high speed internet that most providers have access to.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 13, 2025
J
Verified Purchase
Joe Dolio
Louisville, US
★★★★★ 5
Vital Medical Reference.
Format: Paperback
Outstanding medical knowledge. If you are interested in remote or austere care, this book will help. Great addition to any wilderness first aid library.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 5, 2025
N
Verified Purchase
n8
Dallas, US
★★★★★ 5
Superb resource
Format: Paperback
Excellent resource for any medic, whether you're working in austere conditions or not. Format is laid out very well and the pictures are clear and in color. Highly recommend
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2025

recommand products