Skip to content

Cooling & Oil System > Radiator Overflow Tanks

Browse radiator overflow tanks and expansion header tanks for custom, classic and performance builds across Australia. We stock aluminium and stainless steel designs in polished and black finishes, including rectangular and round styles in various capacities. Ideal for coolant overflow management and clean engine bay setups, shop quality radiator overflow tanks online with fast Australian delivery.

Filters

Aluminium 2.5 Litre Rectangular Shaped Radiator Expansion Header Tank

Cal Custom
$0.00 - $0.00
$0.00
$89.95
$89.95 - $89.95
$89.95
in stock

Fabricated black aluminium 2.5 litre capacity Includes cap Includes two inlet barb fittings, 10.7mm & 14.3mm Also includes overflow/outlet bar...

View full details
$0.00 - $0.00
$0.00
$89.95
$89.95 - $89.95
$89.95

Cal Custom 2" x 13" Radiator Overflow Tank Polished Stainless Steel

Cal Custom
$0.00 - $0.00
$0.00
$79.95
$79.95 - $79.95
$79.95
in stock

2" x 13" cylinder shape Polished stainless steel Maintains OEM performance

$0.00 - $0.00
$0.00
$79.95
$79.95 - $79.95
$79.95

Cal Custom 2" X 10" Radiator Overflow Tank Polished Stainless Steel

Cal Custom
$0.00 - $0.00
$0.00
$73.65
$73.65 - $73.65
$73.65
in stock

2" x 10" cylinder shape Polished stainless steel Maintains OEM performance

$0.00 - $0.00
$0.00
$73.65
$73.65 - $73.65
$73.65
Sold out

Cal Custom 3" X 10" Hexagonal Radiator Overflow Tank Polished Aluminium

Cal Custom
$0.00 - $0.00
$0.00
$94.80
$94.80 - $94.80
$94.80
Out of stock

3" x 10" hexagon shape Polished aluminium Mounting hardware supplied Part Number: CAL-3544

$0.00 - $0.00
$0.00
$94.80
$94.80 - $94.80
$94.80
Sold out

Cal Custom 10" X 2-3/8" Radiator Overflow Tank Polished Billet Aluminium

Cal Custom
$0.00 - $0.00
$0.00
$116.90
$116.90 - $116.90
$116.90
in stock

10" x 2-3/8" cylinder shape Knurled O-ring cap for a no-leak seal Stainless steel hardware included Aluminium push-on fittings included ...

View full details
$0.00 - $0.00
$0.00
$116.90
$116.90 - $116.90
$116.90

Cal Custom 3" x 16" Radiator Overflow Tank Polished Stainless Steel

Cal Custom
$0.00 - $0.00
$0.00
$104.95
$104.95 - $104.95
$104.95
in stock

3" x 16" cylinder shape Polished stainless steel Maintains OEM performance

$0.00 - $0.00
$0.00
$104.95
$104.95 - $104.95
$104.95

Cal Custom 3" x 10" Radiator Overflow Tank Polished Stainless

Cal Custom
$89.95 - $89.95
$89.95
$89.95 - $89.95
$89.95
in stock

3″ x 10″ cylinder shape Polished stainless steel Maintains OEM performance

$89.95 - $89.95
$89.95
$89.95 - $89.95
$89.95

Cal Custom 2" X 15" Radiator Overflow Tank Black Finned Aluminium

Cal Custom
$0.00 - $0.00
$0.00
$98.20
$98.20 - $98.20
$98.20
in stock

Finned aluminium Black anodised 2” x 15” tank (17-1/2” including inlet/outlet on the bottom) Billet cap with o-ring Part Number: CAL-3521

$0.00 - $0.00
$0.00
$98.20
$98.20 - $98.20
$98.20

Aluminium 1.6 Litre Rectangular Wedge Shaped Radiator Expansion Header Tank

Cal Custom
$0.00 - $0.00
$0.00
$124.95
$124.95 - $124.95
$124.95
in stock

Fabricated black aluminium 1.6 litre capacity Includes cap Includes two barb fittings, inlet and overflow/outlet Tank measurements: Height: 124mm...

View full details
$0.00 - $0.00
$0.00
$124.95
$124.95 - $124.95
$124.95

Cal Custom 14" X 2-3/8" Radiator Overflow Tank Polished Billet Aluminium

Cal Custom
$0.00 - $0.00
$0.00
$127.90
$127.90 - $127.90
$127.90
in stock

14" x 2-3/8" cylinder shape Knurled O-ring cap for a no-leak seal Stainless steel hardware included Aluminium push-on fittings included Internal r...

View full details
$0.00 - $0.00
$0.00
$127.90
$127.90 - $127.90
$127.90
Sold out

2" X 13" Radiator Overflow Tank Black Finned Aluminium

Cal Custom
$0.00 - $0.00
$0.00
$91.25
$91.25 - $91.25
$91.25
Out of stock

Finned aluminium Black anodised 2” x 13” tank (15” including inlet/outlet on the bottom) Billet cap with o-ring Part Number: CAL-3520

$0.00 - $0.00
$0.00
$91.25
$91.25 - $91.25
$91.25
Sold out

Cal Custom 2" X 19" Radiator Overflow Tank Polished Stainless Steel

Cal Custom
$0.00 - $0.00
$0.00
$81.25
$81.25 - $81.25
$81.25
in stock

2" x 19" cylinder shape Polished stainless steel Maintains OEM performance Part Number: CAL-3519

$0.00 - $0.00
$0.00
$81.25
$81.25 - $81.25
$81.25

Cal Custom 2" x 17" Radiator Overflow Tank Polished Stainless Steel

Cal Custom
$0.00 - $0.00
$0.00
$89.95
$89.95 - $89.95
$89.95
in stock

2" x 17" cylinder shape Polished stainless steel Maintains OEM performance

$0.00 - $0.00
$0.00
$89.95
$89.95 - $89.95
$89.95

Cal Custom 2" x 15" Radiator Overflow Tank Polished Stainless Steel

Cal Custom
$0.00 - $0.00
$0.00
$84.95
$84.95 - $84.95
$84.95
in stock

2" x 15" cylinder shape Polished stainless steel Maintains OEM performance

$0.00 - $0.00
$0.00
$84.95
$84.95 - $84.95
$84.95