I'm a new Harley owner. I just bought a used Sportster 1200. How do find out what are stock mufflers for this model? I want to make sure I'm legal in CA. The bike is loud, which I like, but I want to be legal. Thanks

 

There are various parts websites which will give you the correct stock muffler part numbers. You can probably then find them around the internet, such as on Ebay, possibly dealer websites.

Here ya go: front #65605-97, rear #65613-97. Here's a pair on Ebay for 50 bucks: #132113615910, there are others.