3' In-line Oil Cooler

The ALLSTAR PERFORMANCE 3' In-line Oil Cooler (SKU ALL 30142) is purpose-built for serious engine builders and high-performance enthusiasts who demand effective thermal management under extreme conditions. Whether you're running a street rod, race vehicle, or modified engine pushing higher horsepower, external oil cooling prevents destructive heat buildup that compromises bearing life, oil viscosity, and overall engine longevity. This inline cooler mounts directly into your oil supply or return circuit, offering a compact yet efficient solution for engines that generate more heat than factory cooling systems can handle.

Constructed from durable aluminum with a natural finish, this 3-foot inline cooler features a heat sink design optimized for rapid heat dissipation without adding significant weight or complexity. The unit measures 2.25 x 2.25 inches in core cross-section and 37.25 inches in overall length, making it adaptable to various engine bay layouts. Both inlet and outlet ports are 3/4-inch NPT female connections, providing standard thread compatibility with aftermarket oil line adapters and sandwich plates. The aluminum construction resists corrosion while the compact profile allows installation in tight spaces typical of custom engine builds and retrofits.

Ideal for mechanics and engine builders upgrading cooling systems on carbureted hot rods, LS engine swaps, forced induction builds, and circle track race cars, this inline oil cooler is especially valuable when OEM cooling capacity falls short. Installation requires basic plumbing—routing oil lines from your engine's main oil galley or pressure port through the cooler before returning to the pan or filter location. Its moderate weight of 3.3 pounds and durable aluminum construction ensure years of reliable service in both street and competition environments where temperature control directly impacts performance and engine durability.