framing for plumbing

Id like to move a washer/dryer about 8 ft into an adjoing room., the wall to be used is framed out with 1x3s,3''faced out,should i rip this out and replace with 2x4s in preparation for the plumbing.the framing is attached to cinder block.

to put the 2" drain in the wall you'd need a 2x4 wall at least.

It might be less work and money to fur the wall out. You could get a 2in pipe in that wall but the amount of extra work adding cats, etc I would just redo it or fur it out.