APDTY 53110 is a brand-new set of 18mm gasket-seat spark plug non-foulers — two foulers and two gaskets — used to space a spark plug or oxygen/exhaust sensor slightly away from direct exhaust flow. Each set includes 2 foulers and 2 gaskets, and fitment should be confirmed against the APDTY compatibility chart for your 18mm gasket-seat application.
Key Takeaways
- What it is: an 18mm gasket-seat non-fouler adapter set (2 foulers + 2 gaskets).
- What it does: threads between the bung and the plug/sensor to move it slightly out of the direct exhaust or combustion stream.
- Fitment: for 18mm gasket-seat applications — match your vehicle to the APDTY compatibility chart to confirm thread and seat before ordering.
- Legal note: emissions-related devices must be used in compliance with federal, state, and local law. Do not use to defeat or disable emissions controls.
Check current availability and buy APDTY 53110 directly from APDTY
What is a spark plug non-fouler?
A spark plug non-fouler is a small threaded adapter that installs between the threaded bung and a spark plug or a screw-in exhaust/oxygen sensor. It recesses the tip slightly so it sits a little further out of the direct flow. Non-foulers are sold in different thread and seat styles; APDTY 53110 is the 18mm gasket-seat version and includes two foulers and two gaskets per set. Using the correct thread size and seat type is essential — an 18mm gasket-seat non-fouler is not interchangeable with tapered-seat or other thread sizes.
What comes in the APDTY 53110 set?
Each APDTY 53110 set includes:
- 2 non-foulers (18mm gasket seat)
- 2 gaskets
If you need more than two, verify quantity before ordering, and confirm you need the 18mm gasket-seat style rather than a tapered-seat or different-thread version.
What vehicles does APDTY 53110 fit?
APDTY 53110 is specified for 18mm gasket-seat applications. APDTY's product listing directs buyers to match their vehicle to the compatibility chart to ensure exact fitment. [VERIFY specific year/make/model application list from the live APDTY 53110 listing before publishing vehicle claims.] Before ordering, confirm the thread size (18mm), the seat type (gasket seat), and that the adapter suits your intended plug or sensor location.
APDTY 53110 specifications at a glance
| Detail | Information |
|---|---|
| APDTY part number | 53110 |
| Product type | Spark plug non-fouler set — 18mm gasket seat |
| Set contents | 2 foulers, 2 gaskets |
| Thread / seat | 18mm, gasket seat |
| UPC | 842955148501 |
| Condition | Brand new |
| Marketplace availability | APDTY.com only |
How do you install an 18mm non-fouler?
This is a general overview only — use the correct procedure for your vehicle and component.
- Confirm the thread and seat. Verify the location is 18mm gasket seat and that a non-fouler is appropriate for your application.
- Work on a cool engine to avoid burns and thread damage.
- Thread the non-fouler into the bung with the supplied gasket, seating it properly without cross-threading.
- Install the plug or sensor into the non-fouler, tightening to the appropriate spec.
- Check clearance so the assembly does not contact surrounding components.
- Verify operation and confirm there are no exhaust leaks at the connection.
Important legal and emissions notice
Non-foulers are sometimes used around emissions-related components. Emissions-control devices and any modifications affecting them are regulated by federal, state, and local law. APDTY 53110 must be used only in a lawful manner. Do not use this product to defeat, disable, or tamper with a vehicle's emissions-control system or to circumvent required emissions testing. Follow all applicable regulations for your area and intended use.
Frequently asked questions
What is included with APDTY 53110?
Each set includes two 18mm gasket-seat non-foulers and two gaskets.
What thread and seat type is APDTY 53110?
It is the 18mm gasket-seat version. Confirm your application uses an 18mm gasket seat — it is not interchangeable with tapered-seat or other thread sizes.
How do I confirm fitment?
Match your vehicle and component to the APDTY compatibility chart, and verify the 18mm thread and gasket-seat type before ordering.
Is it legal to use a non-fouler?
Non-foulers must be used in compliance with federal, state, and local law. They must not be used to defeat or disable emissions controls or to circumvent emissions testing.
Get the correct 18mm gasket-seat non-fouler set
APDTY 53110 is a brand-new 18mm gasket-seat non-fouler set — two foulers and two gaskets. Confirm the 18mm thread and gasket seat, match your application to the APDTY compatibility chart, and use the product in compliance with all applicable emissions laws.
Buy APDTY 53110 18mm Gasket-Seat Non-Fouler Set directly from APDTY