Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
⚠️ California Proposition 65 Warning : Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
Commonly used fitting threads into the filler neck on most radiators allowing connection to an over flow tank. Aluminum fitting has 1/8 NPT threads and accepts a 5/16 hose.
This aluminum fitting is exactly what I needed for my race car's radiator overflow. It connects securely and looks great. No leaks so far, which is a plus! I’m definitely going to keep an eye on how it holds up during the next season.
J
Jasmine Torres
Reliable and Durable
This overflow fitting has been a great addition to my project car. The 1/8 NPT thread worked perfectly, and it hasn't leaked at all. I appreciate the quality of the aluminum; it feels like it will last a long time. Highly recommend for anyone doing similar builds.
E
Emily Johnson
Not as Expected
I ordered this fitting thinking it would work with my current setup, but the threads didn’t quite match what I had. I ended up returning it because it didn’t fit the way I thought it would. Disappointed, but the build quality seemed good.
C
Carlos Mendoza
Solid Quality Overflow Fitting
I bought this Allstar Performance overflow fitting to replace an old plastic one, and I couldn't be happier. The aluminum construction feels really sturdy, plus it fits perfectly with my 1/8 NPT setup. Definitely a good choice for anyone looking to upgrade their radiator system.
A
Aiden Patel
Great for Custom Builds
Used this Allstar fitting for a custom radiator setup. It connected easily to my 5/16 hose, and the aluminum material feels really solid. Just make sure you have the right tools to install it properly. Thumbs up from me!
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.
