USFS approved spark arrestor on cascade csfx?

[supernutt]

Just picked up a cascade CSFX silencer for the dunes.  I hear they are being very strict on sound levels this year. This thing is really quiet.  Shouldn't be a problem there. BUT it has no spark arrestor.  I NEED a spark arrestor.  As far as I know, they never made a 4" round cobra sparky to bolt on to the back of it.  If I put a sink drain screen in it, it would not be USFS approved.  Anyone have any ideas?  Thanks. 

[croat1]

Options:
1.  get a 4" to whatever smaller diameter silicone adapter to then mount a Sparky.
2.  bolt a screened end cap (HMF) to the Casscade end cap.

do they actually check for the USFS marking on the silencers? something new they are doing?  this would back up the dune entrance line big time.  then again I assume the rangers can stop you anytime out in the dunes.

[Skeans1]

Options:
1.  get a 4" to whatever smaller diameter silicone adapter to then mount a Sparky.
2.  bolt a screened end cap (HMF) to the Casscade end cap.

do they actually check for the USFS marking on the silencers? something new they are doing?  this would back up the dune entrance line big time.  then again I assume the rangers can stop you anytime out in the dunes.

Wasn't HMF a 3.5" tube not the 4 or 4.5?

[supernutt]

will silicone hold up to the heat of the silencer? It would have to support the weight of the cobra sparky.  I have been trying to locate a 4" ID to 3" ID aluminum reducer.  I could bolt this to the back of the silencer and then bolt my sparky to this reducer.  I found a steel one but it is awfully heavy and I would rather buy aluminum but having issues finding one.  Ordered a standard end cap from cascade so I can cut the turn down off it and blow the exhaust directly at the sparky and not downward.   If you read the rules for silver lake it does state a USFS approved spark arrestor.  The last time they sound tested me years ago I had my banshee with a toomey spark arrested hush kit on it.  It passed sound easily I think it was at 89 and the limit is 94.  At that time they did look for the USFS stamp and it was there.  SO I would rather be safer than sorry. 

[smackie017]

look here is this what you need he has two spark arrestors https://inlandempire.craigslist.org/mpo/6166568020.html https://images.craigslist.org/00f0f_j2dbPkuZ5fU_600x450.jpg

[supernutt]

I sent him a message.  Thanks for the heads up. I did buy a silicone adapter and am going to safety wire the sparky to the grab bar just in case it doesn't hold. 

[Sand_Blaster]

There's guys in the MI area using drain screeners the stainless Steel ones and cutting to shape and they are , passing no problem.

[supernutt]

I did think about that but IF they wanted to be picky, they could look for the USFS approved stamp on the muffler and there wouldn't be one. thought about stamping one in myself also.