de-cat advice on oem exhaust needed
 

Hi
Assuming that OEM exhaust without cat will help for lower engine temperature, I am asking for advice. Please take a look at the following picture:
http://picasaweb.google.com/petrest8...99123041611506
-Is it easier/better/possible to remove the cat through the window (along red line), or just to cut the pipe along yelow line and drill big hole?
-Is it worth/useful for achiving lower engine temperature?

Thanks for your time.

The cat is very hard to get out. I would cut the pipe on the left side line, before the dotted line on the weld.

As Kev said, It will be better to cut through the welded joint of the tube to get to the cat, will be better for two reasons:

1.- Better clearance to get the cat out.
2.- You can weld again the tube and nothing is noticed.

I remeber seeing some pics in the forum of a dismounted stock exhaust, can't find them now. If I can get some second hand oem cans I will try to do that, remove the cat and doing some things more. But only on cans I can break or loose, oem mines have to be ok for technical inspection. :unibrow:

Thank you Kev.
My plan was based on this
http://picasaweb.google.com/petrest8...49707346115586
Can you confirm, that this chart is correct? I have found it on German's web site.

My intention too.:eusa_pray: But I am scared that cutting on welding line will desintegrate some internal parts of the silencer. Or am I wrong?

Well, as long as you do it with care nothing has to be wrong. Just use an small radial disk cutter and only cut along and not much inside the weld.

OK. Than...what about chart and benefits regarding the heat...if any.

The charts is correct.

If you want all the photos' & on how to do it step by step, it can be found in the modification index.

http://www.xt660.com/site/node/325

Exhaust

Page 2: Standard Can Modification.

There are 15 pages of photos & intructions on how to do it.

Thank you for confirmation.
Regarding the heat and cat, I have found results before / after and they are about 30 C lower on the headers, but including aftermarket silencer. If I get half of that result, I will be happy enough to mount back my bash plate for offroad riding. Just for peace of mind. Thanks again guys.

Mission accomplished. The most important things is to have really, really good welder with sense for art.