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Yes, you can shorten those stock silencer, then also there is cat inside so here is some info
thumpertalk.com
Also you can go twin silencer to single, so maybe exhaust is more easier to find...

09 SMR exhaust mods???
can someone help me out with a stock exhaust mod? I cant seem to find anything using the search 👍 its for a 09 450.
What exhaust you mean, when i don´t see any??Bro, who did this exhaust? It sounds incredible. Can I get a referral?