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Old 07-09-2008, 07:56 AM   #1
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Default "EFRA" what is it?

Can someone tell me what this EFRA number on a pipe is all about? Does it tell me anything about how the pipe will perform or is it simply a stamp of approval?
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Old 07-09-2008, 08:02 AM   #2
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EFRA is kind of like Europe's ROAR. So to answer your question, that simply means the pipe is EFRA approved.
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Old 07-09-2008, 08:14 AM   #3
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It also does tell you a little something about the pipe. Older pipes had 0XX or some other sort of number on them. These would be 086 or 9886, 053, etc. These are two chamber pipes that are no longer legal in Europe. Because they are less restrictive they are often more powerful then newer pipes. Especially the 86's.

2XXX numbered pipes are three chambered (2002, 2012, 2015 etc.) This was the first attempt at reducing noise. Some are pretty restrictive but most make just about as much power as the older 2 chambers and get better mileage.

Now we get 3XXX pipes. EFRA mandated some dimension changes to make them even quieter. I haven't tried any yet but I hear they once again make less power but get better mileage. Also if you buy them as a set you will not get a conical manifold since EFRA has made them illegal as well.
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Old 07-09-2008, 08:28 AM   #4
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do the last two digits equal any kind of volume or let you know if its a bottom or top end pipe?
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Old 07-09-2008, 09:03 AM   #5
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Quote:
Originally Posted by desertbird View Post
do the last two digits equal any kind of volume or let you know if its a bottom or top end pipe?

theres no relation to these numbers and what sort of pipe it is, you would need to check with the manufacturer to find out those details
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Old 07-09-2008, 09:05 AM   #6
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Nope it's just an approval number. Only the series (2xxx, 3xxx, etc.) tells you anything about it.
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Old 07-09-2008, 09:10 AM   #7
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OK. Thanks!
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Old 07-09-2008, 03:15 PM   #8
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The EFRA is good for comparison of pipes, since the EFRA number has a representation of the pipes chambers and internal construction. You'll find EFRA numbers on several pipes from different companies with different part numbers, but the EFRA number will let you know thats its actually the same pipe design. On the other hand, OS used a 2050 and so did Axe rossi with their 2050 pipe. Since those numbers are manufacturers parts numbers, if you look up the EFRA number and you'll find out that they are two different pipes. This is whats good about EFRA numbers. If you go to the EFRA site, you can actually see the dimension drawings of each EFRA pipe thats been approved. Pretty neat info IMO.
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Old 07-09-2008, 03:39 PM   #9
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I was just about to mention that. As an example a Sirio 2013 and an RB 2013 are the exact same pipe. Very helpful.

I still have an old OPS pipe somewhere that actually came with the EFRA homologation sheet with dimensioned drawings. Good thing I had it with me at the worlds since it was not on the list the tech inspector had. Showed him the sheet and all was good.
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Old 07-09-2008, 07:55 PM   #10
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After running through RB's product line up, I see older Novarossi based motors and Sirio based onroad motors, so I figured the pipe's EFRA numbers would follow the same suit also from the those companies.
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