An oil filter relocation kit moves your engine's oil filter away from its factory location to a spot that's easier to reach or better suited to your vehicle's setup.
Factory oil filters sit in tight spaces — wedged against the engine block, tucked under the exhaust manifold, or positioned where your hands barely fit. A relocation kit is a set of metal lines, fittings, and a remote filter housing that lets you mount the filter somewhere more accessible, like on the fender, frame rail, or engine bay wall. The oil still flows through the same filter media and does the same job; it just lives in a different spot.
These kits are most common in off-road vehicles, engine swaps, and heavily modified engines where the original filter location is either unreachable or incompatible with new components. They're also used in some racing builds and in older trucks where space is genuinely limited. For a stock vehicle with a normally accessible filter, a relocation kit is optional — a convenience, not a necessity.
Key Takeaways
- A relocation kit moves your oil filter from the factory location to a remote housing, usually to improve access or work around engine modifications.
- The kit includes steel or aluminum lines, fittings, a sandwich adapter or block adapter, and a new filter housing that mounts separately from the engine.
- Installation requires disconnecting the original filter, routing new lines, and securing the remote housing — a job that takes two to four hours depending on your vehicle.
- Relocation kits cost between $80 and $300 depending on quality and whether they're designed for a specific vehicle or are universal.
- A remote filter setup requires the same maintenance as a factory filter: you still change it at the same intervals and check the lines for leaks.
How the kit connects to your engine's oil system
Oil flows from the engine's oil pump through a filter before returning to the pan. A relocation kit intercepts that flow by replacing the factory filter housing with an adapter — usually a sandwich adapter that bolts to the engine block where the original filter screwed on, or a block adapter that taps into an existing oil passage. From there, steel braided lines carry oil to the remote filter housing, where it passes through the filter element, and then returns to the engine.
The remote housing itself is a cylindrical canister, similar in shape to a traditional spin-on filter but mounted vertically or horizontally on a bracket away from the engine. It holds the same type of filter element your engine normally uses — the size and thread pattern stay the same. The lines are typically stainless steel or aluminum with -10 or -12 AN fittings (aviation standard sizes), which are rated for the pressure and temperature of engine oil.
Because the filter is now remote, you no longer have to reach into a cramped engine bay or wait for the engine to cool before unscrewing it. You can change it standing beside your vehicle with full visibility and room to work.
Types of relocation kits and what they cost
Relocation kits fall into two broad categories: vehicle-specific kits designed for a particular make and model, and universal kits that work with most engines using standard adapters and hose routing.
Vehicle-specific kits come with pre-bent lines, custom brackets, and detailed instructions for your truck or car. They fit more neatly, require less fabrication, and usually cost $150 to $300. Brands like Lokar, Trans-Dapt, and Moroso make kits for popular trucks and muscle cars. Universal kits use adjustable brackets, generic hose lengths, and standard adapters, so you do some of the routing yourself. They cost $80 to $150 but require more hands-on fitting and may need hose trimming or bracket modification to clear engine components.
The adapter type also affects price. A straightforward sandwich adapter that bolts to the existing filter boss costs less than a full block adapter that requires drilling or tapping into the engine block. If your kit requires block work, factor in the cost of a machine shop or the time to do it yourself — typically $50 to $150 in labor if you're not comfortable with it.
Installation steps and what to expect
Installation begins with draining the oil and removing the factory filter. You then bolt the adapter (sandwich or block type) to the engine, thread the new lines from the adapter to the remote housing, and find the housing to a bracket on the frame or fender. The whole job usually takes two to four hours for someone with basic mechanical skills.
Before you start, review the kit instructions and your engine's service manual to locate the oil passages and identify any obstacles the lines might hit. Lay out the hose routing on the engine with the lines unattached — this is where most people catch interference problems before they're expensive. Make sure the lines don't cross sharp edges, touch the exhaust, or get pinched when the engine rocks on its mounts.
Once the lines are routed, use hose clamps or P-clamps to find them every 12 to 18 inches so they don't vibrate or rub. Fill the system with oil, start the engine, and watch for leaks at every fitting. It's normal to see a small drip at the first startup; if it continues after a minute, shut down and tighten the fitting. Check the oil level after five minutes of idle and again after a short drive.
Common reasons to install a relocation kit
The most common reason is engine swaps. When you drop a different engine into a vehicle — say, a modern V8 into a classic truck — the new engine's filter location may not match the original. A relocation kit lets you mount the filter where it fits without fabricating custom brackets or blocking access to other components.
Off-road and racing builds use relocation kits to protect the filter from damage. A filter mounted on the side of the engine block can get crushed by rocks, water crossings, or contact with obstacles. Moving it to a frame rail or inner fender keeps it safer and makes it easier to inspect during maintenance stops.
Some people install them straightforward for convenience. If your factory filter sits under the exhaust manifold or requires removing the wheel well liner to reach it, a remote kit saves time and frustration at every oil change. This is less common in newer vehicles, where manufacturers have generally improved filter access, but it's still a valid reason in older trucks and some European cars.
Maintenance and potential issues
A remote filter setup requires no special maintenance beyond what you'd do with a factory filter. You change the element at the same intervals, check the oil level the same way, and monitor for leaks during normal inspections. The only difference is that you're now checking two connection points (adapter and remote housing) instead of one.
The most common problem is a slow leak at the fittings. This usually happens if the lines weren't tightened enough at installation or if vibration has loosened them over time. Check all connections every few months for the first year, then annually. If you see a persistent drip, shut down, let the engine cool, and tighten the fitting a quarter turn. If it still leaks, the fitting may be damaged and need replacement.
Hose degradation is another issue. Braided stainless lines last a long time, but the rubber inner hose can crack or weep after five to ten years of heat and pressure cycling. If you notice seeping at a hose rather than a fitting, the hose needs replacement. Keep a spare hose and clamps in your vehicle if you do remote driving, and know how to swap it roadside.
Relocation kits versus factory filter access improvements
Before committing to a relocation kit, consider whether a simpler solution exists. Some vehicles benefit from removing the wheel well liner, unbolting a heat shield, or disconnecting a hose to access the factory filter — a five-minute job instead of a four-hour install. Check your service manual or online forums for your specific vehicle; many owners have already solved this problem.
If you're doing an engine swap or heavy modification, a relocation kit is usually the right choice because the factory location won't work anyway. If you're just frustrated with access on a stock vehicle, try the simpler fixes first. A relocation kit is a permanent modification that adds complexity and potential leak points; it's worth it if you're changing the engine or doing frequent maintenance, but less so if you're just annoyed at one oil change a year.
Frequently Asked Questions
Do I need a relocation kit if I'm just doing a basic engine swap?
Not always. If the new engine's filter location is accessible and doesn't interfere with other components, you can leave it where it is. A relocation kit is most useful when the new engine's filter sits in a tight spot or points toward a part of the vehicle that wasn't there before. Check the fit before you buy the kit.
Can I use any hose and fittings, or do I need the kit's specific lines?
You can use quality stainless braided hose and AN fittings from any reputable source, but the kit's pre-bent lines and brackets save time and reduce the chance of routing errors. If you're comfortable with hose routing and have access to a hose shop, generic components work fine and may cost less.
Will a relocation kit affect my oil pressure or filter performance?
No. The filter element and flow rate remain the same; you're just changing the location. Oil pressure may drop slightly due to the extra hose length, but the difference is negligible — usually less than 5 PSI — and won't affect engine operation or filter function.
How often do I need to check the hoses for leaks?
Check all fittings and hose connections every month for the first three months after installation, then every six months during routine maintenance. If you notice seeping, tighten the fitting; if it persists, the hose or fitting needs replacement.
Can I install a relocation kit myself, or do I need a mechanic?
If you're comfortable draining oil, unbolting components, and routing hoses, you can do it yourself. The hardest part is usually fitting the hoses without kinks and ensuring they don't touch hot surfaces. If you're unsure about any step, a mechanic can install it in two to three hours for $200 to $400 in labor.