This is a set of a new front bumper and rear vehicle mode parts for the Transformers Generations: War for Cybertron - Siege Deluxe Class Ironhide figure. The new front bumper attaches into the two top-most 5mm ports on the stock bumper, and the new rear parts simply plug into the 5mm ports on the bottoms of Ironhide's robot mode feet. Once attached, the front bumper can simply stay attached without needing to be removed for transformation. The new back pieces however need to be removed, and then in robot form, you can flip the parts around and attach them to the bottoms of Ironhide's feet once more as foot extensions, giving Ironhide a bit of extra height in robot form. The "exhaust pipes" on the back pieces also end in 3mm pegs, so Siege effect parts can be attached to them.
These items are also available in a kit that includes these parts + my previously made arm covering kit, for those who want to go full Earth mode with their Siege Ironhide.
Full Kit: https://www.shapeways.com/product/5XE62236E/tf-wfc-siege-ironhide-full-earth-mode-kit
The Arm Cover/Shield portion is also available separtely here: