I just got a good deal on YOSHIMURA EXHAUST SYSTEM for 30 in ebay , i can not tell if the 4 in 1 is a stock or YOSHIMURA .
does anyone knows ?http://cgi.ebay.com/ebaymotors/ws/eB....cWAT.m240.lVI

 

4 into 1 is the stock set up. that looks stock but i dont really know do you know if the pipe says not for road use on it i have a yoshie pipe just like that but it says not for road use.

 

the header is stock.

 

[align=left]do i need a another header to get more performance ?
also does any one has the same
YOSHIMURA EXHAUST ? are those any good ?
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you don't really need the header as the choke point on the stock exhaust is the exhuast can. you may need a slight rejet of the carbs since the exhuast is opened up more. with the stock headers, you'll retain most of the bottom end but gain mid and topend. if you went with larger headers, you run the risk of losing most of the bottom end.

 

i found a full yoshi header and muffler at a local wrecking yard. the yoshi header has a real nice merged collector.
what do the jet kits come with? I think stock jetting should work, since i live at 6000ft?

 

Probably some legal matter because they don't meet most states emission requirements; seeing as how most after market pipes are not legal to begin with either.

 

thanks rrasco