FMF
FMF Racing Spark Arrestor Insert for PowerCore 4 HEX - 040670
Item: #227037 | Part Number: 040670$35.99
Description
The FMF Racing Spark Arrestor Insert for PowerCore 4 HEX 040670 provides reliable spark control without sacrificing performance. Designed as a direct replacement, it helps keep your exhaust street-legal while maintaining the aggressive sound and power of the PowerCore 4 HEX system.
FMF Racing Spark Arrestor Insert for PowerCore 4 HEX - 040670 Item # 227037
Description
Replacement spark arrestor for FMF PowerCore 4 HEX.
Part Numbers for FMF Racing Spark Arrestor Insert for PowerCore 4 HEX - 040670
Reviews
Rated 5 out of
5
by
747b from
Great
Worked great, bought a ‘06 wr250f with an aftermarket pipe and no spark arrestor. Changed the jets and it still ran wonky, added the spark arrestor and the back pressure seems to help her run smooth. Also tend to ride in dry forest fire areas.
Fit perfectly and came with all necessary hardware.
Date published: 2024-06-18
Questions
Will this insert also quiet the muffler down? Is it a quiet core insert as well as a spark arrestor?
Yes, this will provide a slight decrease in the noise of the muffler without affecting horsepower
Date published: 2019-09-18
Any way to find out it’s diameter?
As per the manufacturer, it is 1 3/4 inch.
Date published: 2025-10-22