Expansion Tanks

Expansion Tanks & Coolant Degas Bottles

Expansion tanks and degas bottles manage the thermal expansion of coolant as the engine heats up and cools down, maintaining proper system pressure and coolant level. Upgraded billet and fabricated aluminum expansion tanks replace failure-prone factory plastic tanks with stronger, more durable materials and often add a cleaner appearance to the engine bay.

OneFastShop carries expansion tanks including billet aluminum expansion tanks, fabricated aluminum degas bottles, OE-replacement plastic tanks, pressurized and non-pressurized designs, and direct-fit and universal options for cars, trucks, and performance cooling systems.

Every expansion tank at OneFastShop ships brand-new with manufacturer warranty coverage. Whether you're replacing a cracked factory degas bottle, upgrading to a billet tank for a show build, or adding an expansion tank to a custom cooling setup, OneFastShop has the tank. Shop the full expansion tanks collection today.