About Us

Entropy Radiator is a USA based manufacturer of aluminum radiators that began as an Ebay business. Ebay allowed us to sell our radiators directly to our customers without the need for middle men to add unnecessary cost to the product. By selling directly to our customers without wholesalers, jobbers, dealers, manufacturers reps and other middle men adding their share onto the price, we are able to offer our radiators directly to customers at approximatley 30% - 60% less than you would expect to pay for a comparable high quality made in the USA radiator.

All of our radiators are hand TIG welded, made with USA made cores intended for high peformance cooling needs. Most of our cores use 2-rows of 1.0" cooling tubes however we also can special build radiators with 2-rows of 1-1/4" tubes and 1-1/2" tubes.


We've been offering our Entropy USA made radiators on Ebay and Amazon since 2004. We make what we sell and all of our radiators are made in house. We've sold 1000s of radiators to many repeat customers and referrals of customers.

How can your radiator be half the price of X-Cool if it's a high quality unit?

Quite simply, we don't have a bunch of middle men fleecing money out of your pockets and running the price up. With a typical high performance product company, there are a bunch of distribution middle man that don't add any value to the product but since they need a slice of the pie, they run the price up. By selling directly to our customers without wholesalers, warehouse distributors, jobbers, product represenatives, etc, in the way, we can keep our costs way down. We also don't have a big marketing budget that most companies employ, which also runs the price you pay up.

How does your radiator compare to the same X-Cool brand cooling module that is twice the price?

Our units are fully precision TIG welded, made with heavy duty cores and purpose built for the application.These days, many high performance radiator companies only TIG weld the top section of the radiator and have unskilled workers MIG weld the rest of the radiator. We do not do this. Our radiators are 100% TIG welded, made with high grade aluminum alloy tanks, billet machined components and will hold their own next to any familiar brand unit costing 2X or 3X more. On top of that, most of the Summit catalog brand such as X-Cool carry only a 90 day warranty. Our radiator and fan combos have a lifetime warranty on the radiator AND fans.

What type of cap and coolant do you recommend using?

An 18 PSI or higher cap is recommended for cross flow radiators, a 20-22 PSI cap is recommended for down flow radiators. Prestone coolant is recommended for it's superior corrosion resistance.

Do you make custom radiators?

Yes, we welcome custom inquiries. Just ask.

Terms and Conditions


All of our products have a warranty. The warranty on our radiators, fans and all wiring products is lifetime effective 1/1/2013. If your radiator fails during this time, we will repair or replace it  at no cost as long there are not signs of excessive galvanic corrosion (i.e. electrical shorts carrying current in the coolant).


Most orders ship within 2 days of receiving payment. Exceptions are speciality or custom items that are made to order. We ship by UPS. We do not ship US Postal Service. Please note that a delivery signature is required for packages over $250 in value.


You may return your order within 15 days of receipt for exchange or a refund. There is a 20% restocking fee on all returned merchandise. We do not accept returns on custom built units.


We take Visa, Mastercard, Discover and Paypal payments. We also take money orders, cashiers checks via mail.




eCommerce Software by CubeCart