spark arrestor for 4" exhaust?

[reverhart]

Any one know of where I can get a 4" exhaust spark arrestor?

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[partybarge_pilot]

Supertrapp makes up to 3.5". If thats not enough flow, put on a Y pipe and run 2......

[gawdodirt]

I think that any muffler that is not straight through will work with the USFS. Lots of brands come to mind.
Borla
Flowmaster
Edelbrock
?
?

GD