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ok, Ill be getting a z-400 very soon, and I want to get a pipe for it... I want a pipe that will give me lowend power. I want to get like the best one out there for lowend. Could u guys tell me what is the right pipe for me???
 

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I like the HMF, it really woke up my Z, all the way from the bottom to the top

DadsZ400
 

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Is the Hmf Loud? I am looking for a quite pipe,but that gives a not of power.
 

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No the HMF is loud, they have a quiet core but I do not know how much it reduces noise and power.

DadsZ400
 

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For the Trinity Racing Stage IV Muffler. Is the muffler loud Do u know its noise dp. I know the stock one puts out about 92 dp.And they say the Yosh slip-on puts out about 102dp. I am looking to get in to mx and I also do alot of trail riding too. I am going for a muffler that has a bigger bite then bark Or more power then sound. Is the Trinity Loud. I have read about it and they say it puts out alot of power. I just need a good Pipe. And I need help picking one out. So any Suggestions would help.
 

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The Trinity pipe gives a lot more bottom end and isn't any louder than other aftermarket pipes. Check out my site for the new dyno comparison between the Yosh slip-on and the Trinity full system.
 

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WP

Can you provide more details on the Dyno sheets? Looks like the Yoshi pipe lost power over stock. I have the Yoshi slip-on and this info concerns me (may have to "upgrade" to a better pipe). Looks like there is a 10hp difference at 55mph!

Were all other factors the same between runs? Jetting, Lid, etc...

Just FYI - my "seat dyno" did not notice much power from the Yoshi pipe - but it did rev much quicker than stock - but that was also with no lid and a 155 jet - I emailed Yoshi asking for a response to the DW test - they have not replied ; (

The Yoshi dyno sheet is here
http://www.yoshimura-rd.com/new.asp
 

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If u want low end power wait until september and get the White brothers e-series pipe, tons of low end with that pipe.
 

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All of the factors were the same ie: same bike, jetting, intake mods, dyno. The Yosh just plain and simple got smoked. Dirtwheels posted a loss of top end which is what they also came up with. You want bottom end, how about 6 extra ftlb's?
 
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