What a remote oil filter kit does
A remote oil filter kit moves your oil filter away from the engine block to a location you choose — usually the frame rail, inner fender, or firewall. Instead of the filter sitting directly on the engine where heat and space are tight, a hose runs from the engine's oil passage to the remote canister, then back. This keeps the filter cooler, makes it easier to reach during changes, and frees up engine bay space for other components.
Remote kits are most common in engine swaps, custom builds, and vehicles where the factory filter location is cramped or gets too hot. Some people use them on stock engines straightforward because they prefer not to crawl under the car or reach into a tight spot every 3,000 to 10,000 miles.
The kit itself includes the remote filter housing (the canister that holds the filter element), braided steel hoses, fittings, an adapter block that bolts to the engine, and sometimes a thermostat valve that routes cold oil to the filter first. You still buy the same spin-on or cartridge filter you would normally use — the kit just changes where it lives.
Key Takeaways
- A remote oil filter kit moves the filter away from the engine block using hoses and fittings, making it easier to reach and keeping it cooler.
- Installation requires drilling or tapping into the engine block or using an adapter plate, so the job is not a straightforward bolt-on for most vehicles.
- Remote kits cost between $150 and $600 depending on whether you buy a universal kit or one designed for your specific engine and vehicle.
- You will need to bleed air from the system after installation and check hose routing to avoid rubbing against hot surfaces or moving parts.
- Remote filters require the same maintenance interval as factory filters, but you may need to buy a different filter size or type depending on the kit design.
Types of remote filter kits and how they mount
Remote kits fall into two main categories: sandwich adapter kits and full block adapter kits. A sandwich adapter bolts between the engine block and the factory oil filter location, using the existing threaded hole. Hoses run from this adapter to the remote canister. This is the easiest retrofit because you do not have to drill or tap the block — you use what is already there.
A full block adapter requires you to drill a hole in the engine block (or use an existing port if your engine has one) and install a threaded fitting. This gives you more control over where the hose exits the engine and is common in engine swaps where the factory filter location does not exist or is in the wrong place. Some kits use a magnetic drain plug or a spin-on adapter that threads directly into a tapped hole.
Universal kits work with many engines but require you to identify the correct adapter for your block type and thread size. Engine-specific kits (for a Chevy small-block, Ford 302, Dodge Hemi, or similar) come with the right adapter already matched to your engine. Specific kits cost more but save troubleshooting time.
Installation steps and what to expect
Installation begins with draining the oil and removing the factory filter. If you are using a sandwich adapter, you bolt it in place of the filter and thread the filter onto the adapter. If you are drilling the block, you mark the hole location, drill carefully (usually 1/2 inch or 5/8 inch depending on the kit), and install a threaded insert or fitting. This step is irreversible, so measure twice and use a drill press or a guide if possible.
Next, you route the inlet and outlet hoses from the engine to the remote canister. Hoses must not rub against sharp edges, exhaust manifolds, or moving parts like the serpentine belt or fan. Most kits include rubber grommets and clamps to find hoses away from heat and vibration. You will also install any thermostat valve or check valve the kit includes — these prevent oil from draining back into the engine when it is off and can help warm cold oil faster in winter.
After hoses are routed and tightened, you fill the system with oil and start the engine. Air trapped in the hoses and filter will cause the oil pressure gauge to read low or flicker. You may need to loosen a bleeder screw on the remote canister or run the engine briefly, shut it off, and let air bubbles rise for a few minutes. This process can take several cycles before pressure stabilizes.
Cost breakdown for remote filter kits
A basic universal remote filter kit costs between $150 and $300. These kits include the canister, hoses, fittings, and a sandwich adapter or straightforward block adapter. You supply your own filter and do the installation yourself. Popular brands in this range include Lokar, Trans-Dapt, and Moroso.
Engine-specific kits run $250 to $600 because they are engineered for a particular block and often include a thermostat valve, magnetic drain plug, or custom adapter. A Chevy small-block remote kit, for example, costs more than a generic universal kit because the adapter is already matched to the bolt pattern and port locations.
Professional installation adds $200 to $500 depending on how much drilling or custom work is needed. If you are paying a shop to drill the block, tap threads, and route hoses, expect the high end of that range. If you are using a sandwich adapter and the shop is just bolting it on and routing hoses, labor will be lower.
Replacement filters cost the same as the filter you would buy for the factory location — typically $8 to $25 for a spin-on cartridge. Some remote kits use a different filter size than the factory setup, so check the kit documentation before you buy filters in bulk.
Advantages and limitations of remote filter placement
The main advantage is accessibility. Changing a filter that hangs on the frame rail or fender takes seconds compared to crawling under the car or reaching into a tight engine bay. For people who change their own oil frequently, this saves time and frustration over the life of the vehicle.
Remote placement also keeps the filter cooler. Engine block temperatures can exceed 200 degrees Fahrenheit, which ages filter media faster. A filter mounted on the frame rail or inner fender stays 30 to 50 degrees cooler, potentially extending filter life and reducing the risk of filter bypass (where unfiltered oil flows past the element if it clogs).
The main limitation is complexity. A remote kit adds hoses, fittings, and potential leak points compared to a straightforward spin-on filter. If a hose cracks or a fitting loosens, you lose oil pressure and must stop when ready. Sandwich adapters are simpler, but drilling the block for a full adapter is a permanent modification that cannot be undone.
Remote kits also require more careful installation. Hoses must be routed away from heat and moving parts, the system must be bled of air, and you must check for leaks before driving. A factory filter is a five-minute job; a remote kit is a two-hour job the first time.
Choosing between sandwich adapter and full block adapter
Use a sandwich adapter if your engine has a factory oil filter location and you want the easiest retrofit. The adapter bolts where the filter normally goes, so no drilling is required. This works for most stock engines and is the best choice if you are not comfortable drilling metal or if you plan to sell the vehicle later and want to reverse the modification.
Use a full block adapter if you are doing an engine swap, the factory filter location is blocked or does not exist, or you want the filter mounted in a specific location for clearance or aesthetics. This requires drilling and tapping the block, but it gives you complete control over hose routing and filter placement. Full block adapters are standard in custom builds because they are cleaner and more professional-looking.
If you are unsure which your engine needs, check the kit documentation or contact the manufacturer with your engine type and year. Most kits are designed for one or the other, and using the wrong type will either not fit or require modification.
Maintenance and troubleshooting after installation
After installation, check all hose connections and fittings every time you change the oil. Vibration and heat can loosen fittings over time. Tighten any fitting that weeps oil, and replace any hose that shows cracks or bulging. Hoses typically last 5 to 10 years depending on temperature and oil type.
If oil pressure drops suddenly after installation, the system likely has air in it. Stop the engine, loosen the bleeder screw on the remote canister (if equipped), and run the engine briefly until oil flows from the bleeder. Repeat until no air bubbles appear. If pressure remains low, check that the inlet hose is submerged in the oil pan and that no fittings are loose.
If the remote filter leaks at the spin-on threads, the filter may not be seated correctly or the adapter threads may be damaged. Remove the filter, clean the threads on the adapter with a cloth, and reinstall the filter hand-tight plus one-half turn. Do not over-tighten, as this can strip threads or crack the filter housing.
Replace the filter on the same schedule as you would with a factory setup — every 3,000 to 10,000 miles depending on your oil type and driving conditions. The remote location does not change the filter's lifespan, though cooler temperatures may extend it slightly.
Frequently Asked Questions
Can I install a remote filter kit on any engine?
Most engines can use a sandwich adapter kit because nearly all have a factory oil filter location. Full block adapter kits are more limited and depend on whether your engine has a suitable port or whether you are willing to drill one. Check the kit manufacturer's compatibility list for your specific engine and year before buying.
Do I need special tools to drill the engine block?
A drill press, the correct drill bit size, and a tapping tool (if you need to thread the hole) are essential. A hand drill can work but is risky because it is hard to keep the bit perpendicular to the block. Many shops will drill and tap the hole for $50 to $150 if you do not have the tools or confidence to do it yourself.
Will a remote filter kit affect my oil pressure or engine performance?
No, as long as the system is installed correctly and bled of air. The hoses add minimal resistance to oil flow. If oil pressure is low after installation, air is trapped in the system — bleed it out by loosening the bleeder screw and running the engine briefly.
What happens if a hose ruptures while driving?
You will lose oil pressure within seconds and the engine will shut down or seize if you do not stop when ready. This is why hose routing is critical — hoses must be secured away from sharp edges, exhaust, and moving parts. Use braided steel hoses (not rubber alone) and check them regularly for cracks or bulging.
Can I use a remote filter kit with a synthetic oil?
Yes. Synthetic oil flows through hoses and remote filters the same way conventional oil does. Some people prefer remote kits with synthetic oil because the cooler filter temperature helps preserve the oil's properties longer between changes.