stock 05 wr450 exhaust mod

I just got a new 05 WRF 450, and am wondering what I can do to the stock exhaust..... i want to get as much juice from it, but still keep it quiet. Can I just remove the inner tube? How is this done, do I grind out the two rivets?? Or do I need to get a new end cap?

Jesse

82 Yamaha XT 550

87 Kawasaki KLR 650

05 Kawasaki KLR 650

05 Yamaha WRF 450

by inner tube do you mean the perforated core?

if it is the perf core that you're referring to then i wouldnt pull it out and toos it, but i would change the core to a different ratio of metal to holes. 60/40 Perf core is apparently the go.

I have a Promoto Billet insert I will sell you that does a nice job.

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