Skip to content

Radiator Caps & Filler Necks

Ace Race Parts offers 6061 aluminum radiator filler neck replacements in two common sizes, Small and Large, along with a Koyo and Mishimoto brand high-pressure radiator caps. Each radiator filler neck is precision CNC machined from billet 6061 aluminum and features a two piece threaded design. Available in small and... Read More

Weld On Radiator Filler Neck - Small (1.250" ID, 0.750" Outlet) - 6061 Aluminum

SKU 17001
Original price $ 21.95 - Original price $ 21.95
Original price
$ 21.95
$ 21.95 - $ 21.95
Current price $ 21.95
25+ in stock

Ace Race Parts offers Weld On Radiator Filler Necks that are precision CNC machined from solid 6061 Aluminum billet and come with a 1/16" NPT x 1/4...

View full details

Weld On Radiator Filler Neck - Large (1.650" ID, 1.092" Outlet) - 6061 Aluminum

SKU 17002
Original price $ 22.95 - Original price $ 22.95
Original price
$ 22.95
$ 22.95 - $ 22.95
Current price $ 22.95
25+ in stock

Ace Race Parts offers Weld On Radiator Filler Necks that are precision CNC machined from solid 6061 Aluminum billet and come with a 1/16" NPT x 1/4...

View full details

Tank Weld Bung with Thread On Cap - 1.000" ID - 6061 Aluminum

SKU 17003
Original price $ 34.99 - Original price $ 34.99
Original price
$ 34.99
$ 34.99 - $ 34.99
Current price $ 34.99
25+ in stock

Ace Race Parts offers Tank Weld Bungs that are precision CNC machined from solid 6061 Aluminum billet and come with a thread-on cap featuring an O-...

View full details

Tank Weld Bung with Thread On Cap - 1.500" ID - 6061 Aluminum

SKU 17004
Original price $ 34.99 - Original price $ 34.99
Original price
$ 34.99
$ 34.99 - $ 34.99
Current price $ 34.99
25+ in stock

Ace Race Parts offers Tank Weld Bungs that are precision CNC machined from solid 6061 Aluminum billet and come with a thread-on cap featuring an O-...

View full details

Tank Weld Bung with Thread On Cap - 2.000" ID - 6061 Aluminum

SKU 17005
Original price $ 38.99 - Original price $ 38.99
Original price
$ 38.99
$ 38.99 - $ 38.99
Current price $ 38.99
25+ in stock

Ace Race Parts offers Tank Weld Bungs that are precision CNC machined from solid 6061 Aluminum billet and come with a thread-on cap featuring an O-...

View full details

Tank Weld Bung with Thread On Cap - 2.500" ID - 6061 Aluminum

SKU 17006
Original price $ 45.99 - Original price $ 45.99
Original price
$ 45.99
$ 45.99 - $ 45.99
Current price $ 45.99
25+ in stock

Ace Race Parts offers Tank Weld Bungs that are precision CNC machined from solid 6061 Aluminum billet and come with a thread-on cap featuring an O-...

View full details

Tank Weld Bung with Thread On Cap - 3.000" ID - 6061 Aluminum

SKU 17007
Original price $ 59.99 - Original price $ 59.99
Original price
$ 59.99
$ 59.99 - $ 59.99
Current price $ 59.99
25+ in stock

Ace Race Parts offers Tank Weld Bungs that are precision CNC machined from solid 6061 Aluminum billet and come with a thread-on cap featuring an O-...

View full details

Mishimoto High Pressure Radiator Cap 1.3 Bar - Small (MMRC-13-SM)

SKU MMRC-13-SM
Original price $ 0.00 - Original price $ 0.00
Original price $ 0.00
$ 24.95
$ 24.95 - $ 24.95
Current price $ 24.95
Only 3 left!

Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becom...

View full details

Mishimoto High Pressure Carbon Fiber Radiator Cap 1.3 Bar - Small (MMRC-13-SMCF)

SKU MMRC-13-SMCF
Original price $ 0.00 - Original price $ 0.00
Original price $ 0.00
$ 37.95
$ 37.95 - $ 37.95
Current price $ 37.95
Only 5 left!

Mishimoto has developed a carbon fiber radiator cap to enhance the style of your engine bay while maintaining the pressure in your cooling system. ...

View full details

Mishimoto High Pressure Radiator Cap 2.0 Bar - Small (MMRC-20-SM)

SKU MMRC-20-SM
Original price $ 24.95 - Original price $ 24.95
Original price
$ 24.95
$ 24.95 - $ 24.95
Current price $ 24.95
Only 1 left!

Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becom...

View full details

Mishimoto High Pressure Radiator Cap 1.3 Bar - Large (MMRC-13L)

SKU MMRC-13L
Original price $ 24.95 - Original price $ 24.95
Original price
$ 24.95
$ 24.95 - $ 24.95
Current price $ 24.95
Only 4 left!

Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becom...

View full details

Koyo 1.3 Bar High Pressure Radiator Cap - Red (SK-C13)

SKU SK-C13
Original price $ 49.20
Original price $ 49.20 - Original price $ 49.20
Original price $ 49.20
Current price $ 39.20
$ 39.20 - $ 39.20
Current price $ 39.20
Only 2 left!

Can you handle the pressure? The Koyorad hyper Radiator Cap is for intelligent tuners who demand to extract every ounce of cooling efficiency from ...

View full details