Adapters

Adapters: the fittings that make mismatched parts bolt up and seal

Adapters are the small threaded and flanged pieces that let two components that were never designed to meet join up and hold pressure. In practice that means converting an AN hose end to a port thread, mounting an oil cooler sandwich between the block and filter, stepping a filter housing to a different thread, or bolting an aftermarket manifold to a different pattern. When you're plumbing fuel, oil or coolant on a swap or a build, the adapters are what keep the fittings sealed and the geometry correct. Get them wrong and you leak; get them right and the rest of the job falls into place.

What's stocked here

This category holds 699 products across roughly 26 brands. Vibrant is the deepest line by a wide margin, with Fragola, Russell, Radium Engineering and Rywire filling out the AN, oil-block and chassis-adapter side. You'll also find DeatschWerks, Turbosmart, Injector Dynamics, GReddy, Skunk2 Racing, Fleece Performance and Mishimoto. Current in-stock pricing runs from $15 to $494 — that's the live range, not a fixed promise.

Concrete examples across that spread: the Fragola -20AN 90-degree low-profile forged hose end for large-bore plumbing, the GReddy x Taarks RB26 bolt-on oil block adapter for Skyline builds, the Sinister Diesel Duramax CAT filter adapter, the Kooks small-block Ford adapter plate kit, and Rywire's chassis-side pieces like the Race Style chassis adapter relay/fuse box and the Honda EG/DC/EK drive-by-wire pedal kit.

How to choose

Start with the connection you actually have. If you're plumbing fuel or oil lines, match your AN size and thread first — the Vibrant and Fragola ranges cover the bulk of the straight, angled and reducer options. If you're mounting an accessory to the oil circuit, you want a block or sandwich adapter cut for your specific engine, like the RB26 piece above. Diesel filter and Ford plate work needs the vehicle-specific fitment kits, not a generic fitting. As a rule: cheaper single fittings solve one thread, while the higher-priced kits solve a whole subsystem and save you sourcing pieces one at a time.

What else you need with it

Adapters rarely ship alone. Pair AN adapters with Fittings to complete a line, and if you're building a fuel system look at Fuel Pumps and Fuel Injectors. Oil-side jobs often need Oil Filters, and manifold or plate swaps usually call for fresh Gasket Kits. Browse everything under the Engine Components section to line up the rest of the build.

Fitment and ordering

Only 30 of these products carry detailed fitment data, covering makes including Honda, Subaru, Nissan, Acura, GM, Ford, Chevrolet, Scion and Mitsubishi, with model years spanning 1988 to 2023 — treat that as a sample, not the full compatibility list. If you're not certain a given adapter matches your threads or engine, call our fitment help line at 813-535-5801 before you order. All orders ship free, and Affirm and Katapult financing is available at checkout.

Adapters: the fittings that make mismatched parts bolt up and seal

Adapters are the small threaded and flanged pieces that let two components that were never designed to meet join up and hold pressure. In practice that means converting an AN hose end to a port thread, mounting an oil cooler sandwich between the block and filter, stepping a filter housing to a different thread, or bolting an aftermarket manifold to a different pattern. When you're plumbing fuel, oil or coolant on a swap or a build, the adapters are what keep the fittings sealed and the geometry correct. Get them wrong and you leak; get them right and the rest of the job falls into place.

What's stocked here

This category holds 699 products across roughly 26 brands. Vibrant is the deepest line by a wide margin, with Fragola, Russell, Radium Engineering and Rywire filling out the AN, oil-block and chassis-adapter side. You'll also find DeatschWerks, Turbosmart, Injector Dynamics, GReddy, Skunk2 Racing, Fleece Performance and Mishimoto. Current in-stock pricing runs from $15 to $494 — that's the live range, not a fixed promise.

Concrete examples across that spread: the Fragola -20AN 90-degree low-profile forged hose end for large-bore plumbing, the GReddy x Taarks RB26 bolt-on oil block adapter for Skyline builds, the Sinister Diesel Duramax CAT filter adapter, the Kooks small-block Ford adapter plate kit, and Rywire's chassis-side pieces like the Race Style chassis adapter relay/fuse box and the Honda EG/DC/EK drive-by-wire pedal kit.

How to choose

Start with the connection you actually have. If you're plumbing fuel or oil lines, match your AN size and thread first — the Vibrant and Fragola ranges cover the bulk of the straight, angled and reducer options. If you're mounting an accessory to the oil circuit, you want a block or sandwich adapter cut for your specific engine, like the RB26 piece above. Diesel filter and Ford plate work needs the vehicle-specific fitment kits, not a generic fitting. As a rule: cheaper single fittings solve one thread, while the higher-priced kits solve a whole subsystem and save you sourcing pieces one at a time.

What else you need with it

Adapters rarely ship alone. Pair AN adapters with Fittings to complete a line, and if you're building a fuel system look at Fuel Pumps and Fuel Injectors. Oil-side jobs often need Oil Filters, and manifold or plate swaps usually call for fresh Gasket Kits. Browse everything under the Engine Components section to line up the rest of the build.

Fitment and ordering

Only 30 of these products carry detailed fitment data, covering makes including Honda, Subaru, Nissan, Acura, GM, Ford, Chevrolet, Scion and Mitsubishi, with model years spanning 1988 to 2023 — treat that as a sample, not the full compatibility list. If you're not certain a given adapter matches your threads or engine, call our fitment help line at 813-535-5801 before you order. All orders ship free, and Affirm and Katapult financing is available at checkout.