I'm getting ready to reinstall my CATLESS head pipe on my 11 Limited and was wondering what the proper procedure was as far as tightening the flange nuts and what the torque specs are. I don't have a service manual yet. Any help would be appreciated.

 

I just did this this past weekend. I followed the procedure in the HD service manual. From memory (someone may want to check me on this):

Tighten the lower nut on the rear flange to 9 to 12 in lbs
Tighten the top nut on the rear flange to 100 to 120 in lbs
Tighten the lower nut on the rear flange to 100 to 120 in lbs

Tighten the lower nut on the front flange to 9 to 12 in lbs
Tighten the top nut on the front flange to 100 to 120 in lbs
Tighten the lower nut on the front flange to 100 to 120 in lbs

Hope this helps. Good luck.

 

How was it getting the CAT removed?

 

I would check the manual again. I am not at home but it seems like those torque values are really high...I could be wrong. I am a lot

 

Equandt has it right...just looked in my book.

 

You realize he said INCH lbs. right? That's the equivalent of about 8-10 FT/lbs. Not really that high.

 

Had a local shop cut the pipe in half. Removing all the CAT material is a pain. Then had a local welder put it back together. Took probably 3 to 4 hours to remove all the CAT and clean it all up.

 

Thanks guys, I'll tackle this over the weekend,