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best tuned pipe for the O.S. 21 outboard

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best tuned pipe for the O.S. 21 outboard

Old 03-27-2006, 09:18 PM
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lelandhild
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Default best tuned pipe for the O.S. 21 outboard

What is the best tuned pipe for the o.s. 21. outboard. What kind of speed would it get me to.
Old 03-27-2006, 11:34 PM
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ob nut
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Default RE: best tuned pipe for the O.S. 21 outboard

There are several pipes that can be used on any outboard. They generally give an extra 5+/- mph more than stock setup. It's not all pipe either. Props play a lot into speed that a boat will obtain. BTW: a "sport" O.S. has the NAMBA SAW record at 54.85 mph. Thats with the stock muffler, no pipe. But back to pipes, Silver Bullet HP, SPP carbon fiber, Cooper quiet pipe & Irwin are all good pipes to use.
Old 03-28-2006, 07:45 AM
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Default RE: best tuned pipe for the O.S. 21 outboard

Thanks for the help

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