Pro Circuit 304 Silencer Price: $119.95 from $100.88 on Amazon
The Bike: 2013 KTM 250 SX
Pro Circuit 304 Silencer Weight: 2.52 lbs (stock is 3.6 lbs)
Power: It’s crazy how much difference a silencer can make. The Pro Circuit 304 made my bike run cleaner, improved bottom end and improved over rev noticeably.
Install: The silencer actually comes with all necessary hardware (rubber grommets, washers and bolts) and the rubber grommets are pre-installed. The install is a matter of getting the stock silencer out of the way, sliding the Pro Circuit 304 into place and tightening the bolts.
Quality: The Pro Circuit 304 is more durable than the FMF Powercore 2. That said I have a lot of experience with both and they both do have their issues and tend to break at the weld where the mid pipe is welded to the silencer can (happens a lot faster with the FMF). On this particular silencer I lost the allen bolts on the silencer at 10 hours. Next time I will make make sure to take them out, use lock tite and re-tighten them so they don’t fall out.
Final Thoughts: If you haven’t thrown out your stock silencer and put an aftermarket silencer on your KTM 250 SX you don’t know what you’re missing out on. Do yourself a favor, visit one of our retail partner links below and buy an aftermarket silencer, they make a huge difference on this particular bike. Choose the 304 if you want your bike to rev further or the R-304 for a bit more bottom end (it revs out better than stock too!!).