Oil Line Fittings

Oil Line Fittings: the small parts that keep an oil circuit sealed

Oil line fittings are the threaded connectors that join an oil hose to a cooler, an adapter housing, a pump, or a block port. When you plumb an oil cooler or reroute an oil feed, these fittings set the thread type, the hose size, and the angle the line leaves at. Get the right oil line fittings and the circuit seals clean and routes without kinks; get the wrong thread or angle and you fight leaks and tight bends every time you turn a wrench.

The straight fittings pass oil in a direct line. The 90-degree pieces let you turn the hose hard against a firewall or bracket where a straight fitting would foul. Kits designed for a specific chassis give you the adapters and AN sizes that match that engine's ports rather than a universal guess.

What ThreePiece stocks

This category currently holds 4 products from 3 brands: Mishimoto, CSF and Bikers Choice. Current in-stock prices run from $29 to $108 - that's the live range for what's on the shelf now, not a standing offer. On the vehicle-specific end, the Mishimoto BMW E36/E46/E90 Oil Line Fitting Kit and the CSF BMW -10 AN Adapter Fitting Kit are both built around BMW applications. For universal work, Bikers Choice offers a 1/8 NPT x 3/8 hose straight fitting and a matching 90-degree fitting for custom lines.

How to choose

Two questions decide this: is your job chassis-specific or custom, and what angle does the hose need to leave at? If you are plumbing a BMW oil cooler or adapter setup, the Mishimoto kit and the CSF -10 AN adapter kit are matched to that hardware, which saves you sizing thread adapters yourself. If you are building your own line - common on bikes and custom engine work - the Bikers Choice 1/8 NPT x 3/8 hose fittings let you pick straight or 90-degree per hose end. The universal fittings sit near the bottom of the price range; the vehicle-specific kits sit toward the top because they include more pieces.

What else you need with it

Fittings are one part of the circuit. Browse general Fittings and thread Adapters to complete a run, and check Oil Filters when the oil circuit is already apart. If your project is a wider engine job, the Radiators, Gasket Kits and Head Gaskets categories sit alongside this one. All of these live under the main Engine Components section.

Fitment help and ordering

None of the four listings here carry structured fitment data, so match thread type, AN size and hose diameter to your own parts before ordering - the two BMW-focused kits are named for BMW applications, and the Bikers Choice pieces are universal. If you're unsure which fitting matches your setup, call our fitment line at 813-535-5801 or reach us through contact us. Every order ships with free shipping, and Affirm and Katapult financing is available at checkout through our financing options.

Oil Line Fittings: the small parts that keep an oil circuit sealed

Oil line fittings are the threaded connectors that join an oil hose to a cooler, an adapter housing, a pump, or a block port. When you plumb an oil cooler or reroute an oil feed, these fittings set the thread type, the hose size, and the angle the line leaves at. Get the right oil line fittings and the circuit seals clean and routes without kinks; get the wrong thread or angle and you fight leaks and tight bends every time you turn a wrench.

The straight fittings pass oil in a direct line. The 90-degree pieces let you turn the hose hard against a firewall or bracket where a straight fitting would foul. Kits designed for a specific chassis give you the adapters and AN sizes that match that engine's ports rather than a universal guess.

What ThreePiece stocks

This category currently holds 4 products from 3 brands: Mishimoto, CSF and Bikers Choice. Current in-stock prices run from $29 to $108 - that's the live range for what's on the shelf now, not a standing offer. On the vehicle-specific end, the Mishimoto BMW E36/E46/E90 Oil Line Fitting Kit and the CSF BMW -10 AN Adapter Fitting Kit are both built around BMW applications. For universal work, Bikers Choice offers a 1/8 NPT x 3/8 hose straight fitting and a matching 90-degree fitting for custom lines.

How to choose

Two questions decide this: is your job chassis-specific or custom, and what angle does the hose need to leave at? If you are plumbing a BMW oil cooler or adapter setup, the Mishimoto kit and the CSF -10 AN adapter kit are matched to that hardware, which saves you sizing thread adapters yourself. If you are building your own line - common on bikes and custom engine work - the Bikers Choice 1/8 NPT x 3/8 hose fittings let you pick straight or 90-degree per hose end. The universal fittings sit near the bottom of the price range; the vehicle-specific kits sit toward the top because they include more pieces.

What else you need with it

Fittings are one part of the circuit. Browse general Fittings and thread Adapters to complete a run, and check Oil Filters when the oil circuit is already apart. If your project is a wider engine job, the Radiators, Gasket Kits and Head Gaskets categories sit alongside this one. All of these live under the main Engine Components section.

Fitment help and ordering

None of the four listings here carry structured fitment data, so match thread type, AN size and hose diameter to your own parts before ordering - the two BMW-focused kits are named for BMW applications, and the Bikers Choice pieces are universal. If you're unsure which fitting matches your setup, call our fitment line at 813-535-5801 or reach us through contact us. Every order ships with free shipping, and Affirm and Katapult financing is available at checkout through our financing options.