Apparently these might help engine performance....

[5 Horse Fan]

Arc Briggs 5HP Exhaust Inserts Qty 7 | eBay

 

[buckeye]

Does it make sense????

 

[cheezy1]

Does it make sense????

Yes

 

[buckeye]

Worth the dime then huh? I always need more speed.imp:

 

[creia]

Yes- they do produce a slight performance gain and were prohibited in Karting for this very reason. In addition to providing a smooth wall inside the exhaust port (no exposed threads to cause turbulence) for better flow, in addition, by design, the exhaust port on the Briggs 5 HP is a bit too large for maximum performance. The insert reduces the I.D. and provides a little more back pressure which will help performance with a properly designed multi-staged header pipe. We installed one of these on my son's (modified) Briggs Raptor 3 and you could tell a slight difference.
Michael

 

[cheezy1]

what he said ^^^^

 

[driggs]

Does it make sense????

I prefer a magnet in the gas tank myself...

 

[buckeye]

Huh??

 

[rmm727]

... the exhaust port on the Briggs 5 HP is a bit too large for maximum performance.

Was going to put this but Michael beat me too it.

 

[Newoldstock]

They work.

Not huge gain but they do exactly as described.
Fix a port issue.....

 

[125ccCrazy]

easily made from a piece of gas pipe reamed out...

 

[buckeye]

Sold for 50 or so bucks. :scared: