Pretty certain the H & R lowering springs are for all Avenger models. Every place I've seen shows they are anyway. H & R doesn't show 2.4L or 3.6L on their end so I'd say all models too.
Part number is 50835 .
Also, you will need/want adjustable rear arms installed too so you can do an alignment afterward. SPC kit 67018 is what I have in mine. It's been 8 years since I lowered mine and there weren't any specs for the alignment so at the time, i told my tech to either eyeball it or use another Dodge for reference.