I'm hopefully going to refresh my suspension this summer, and was wondering if rear upper control arms off an EG will just bolt on? I can get them for about half the price of EF arms. I searched around and couldn't find a definite answer.

 

The control arms will physically fit but they may have a different lengths, which would alter your camber.

I compared rear UCAs from roackauto.com and the prices are ~$60 shipped for the cheapest set, no real price difference between the EF and EG.

Have you thought about getting camber adjustable arms? You can get a set from BLOX at jhpusa.com for $75 shipped.

 

Turns out they're the same length: EF Hybrid Suspension