APDTY 53113 is a brand-new set of two 18mm tapered-seat spark plug non-foulers, used to space a spark plug or exhaust/oxygen sensor slightly away from direct exhaust flow. The set includes 2 non-foulers, and fitment should be confirmed against the APDTY compatibility chart for your 18mm tapered-seat application.
Key Takeaways
- What it is: an 18mm tapered-seat non-fouler set (2 pieces).
- 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 tapered-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.
Check current availability and buy APDTY 53113 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, recessing the tip slightly out of the direct flow. Non-foulers are sold in different thread and seat styles; APDTY 53113 is the 18mm tapered-seat version. Using the correct thread size and seat type is essential — an 18mm tapered-seat non-fouler is not interchangeable with gasket-seat or other thread sizes.
What comes in the APDTY 53113 set?
Each APDTY 53113 set includes two 18mm tapered-seat non-foulers. Confirm you need the tapered-seat style rather than the gasket-seat version (APDTY 53110) before ordering.
What vehicles does APDTY 53113 fit?
APDTY 53113 is specified for 18mm tapered-seat applications. APDTY's 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 53113 listing before publishing vehicle claims.] Before ordering, confirm the thread size (18mm) and the seat type (tapered) match your intended plug or sensor location.
APDTY 53113 specifications at a glance
| Detail | Information |
|---|---|
| APDTY part number | 53113 |
| Product type | Spark plug non-fouler set — 18mm tapered seat |
| Set contents | 2 non-foulers |
| Thread / seat | 18mm, tapered seat |
| Related APDTY part | APDTY 53110 (18mm gasket seat) |
| UPC | 403000032987 |
| Marketplace availability | APDTY.com only |
How do you install an 18mm tapered-seat 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 tapered 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, 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 53113 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.
Frequently asked questions
What is included with APDTY 53113?
Each set includes two 18mm tapered-seat spark plug non-foulers.
What is the difference between APDTY 53113 and 53110?
APDTY 53113 is the 18mm tapered-seat version. APDTY 53110 is the 18mm gasket-seat version. They are not interchangeable — confirm your application's seat type before ordering.
How do I confirm fitment?
Match your vehicle and component to the APDTY compatibility chart, and verify the 18mm thread and tapered-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 tapered-seat non-fouler set
APDTY 53113 is a brand-new 18mm tapered-seat non-fouler set of two. Confirm the 18mm thread and tapered seat, match your application to the APDTY compatibility chart, and use the product in compliance with all applicable emissions laws.
Buy APDTY 53113 18mm Tapered-Seat Non-Fouler Set directly from APDTY