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They improve torque over separate pipes, which is why all brands of bikes with twin-cylinder engines have used them since the 60s. A proper 2-into-1 will give even better performance.
A friend of mine has a book that was written by a guy that tested all kinds of pipes on shovels and evo's.
According to the book the best pipes for power is the stock pipes with SE slip-on's.
2 into 1's are a close second.
According to the book the best pipes for power is the stock pipes with SE slip-on's.
2 into 1's are a close second.
Never heard that before, but I'll buy it.
I run stock with old SE slip ons and sound and power are bloody perfect.
I've tried a LOT of other setups and the only one left is Supertrapp which I would think would improve power because you can "dial" in the back-pressure.
The other setups V&H, Sampson, Rush, etc are just so damn loud!
Thanks for the info on that TexasHillMan.
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