"They have Scottish internationals Gordon Bulloch at hooker and Matt Proudfoot at prop and they make for a very strong front-row," said Howells.
"Then you look at their flankers Jon Petrie and Roland Reid and you begin to realise that you could be in for one hell of a dogfight.
"They have beaten us once this season, when they taught us a bit of a lesson on our own patch. And while we played very poorly, you could see that Glasgow are very organised side.
"We have to be even more organised and stop them making the hard yards."