Topic: K1 exhaust vs K4 exhaust

[beemerbum]

I see reproduction 4 into 4 exhausts for the K4 at $1095. I also see K1 repro exhausts for $400 more. What is the diffrence? Don't they all mount up the same '69 thru '76?

[ekpent]

The mount up the same. The HM300 K1 exhaust has a real baffle and less interior chambers and better flow and sound. The later HM341 for 72-76 have more interior chambers and just a diffusor cap on the end of the pipe with no baffle.