Fender frame? What is this called? - Fabrication / Welding - HybridZ

Trying to find out what this is called. Obviously needs some correction and replacement. I have also been looking through threads regarding chassis stiffening hoping someone has reinforced this and could offer advice on how to repair this if i cannot source a replacement

Chinese Custom Made Welded Framework Welding Frame - China Welding

Fender frame? What is this called? - Fabrication / Welding - HybridZ

Fabricated Fender Vents - Fabrication / Welding - HybridZ

Blue foam for fiberglass mold ? what is it - Fabrication / Welding

73' SR240Z - AmbiVe

Fabricated Fender Vents - Fabrication / Welding - HybridZ

My '72 240z project -- Rotisserie Restomod - S30 Series - 240z

rust repair need help - Fabrication / Welding - HybridZ

ubergumgum's Content - Page 2 - HybridZ

My Swiss 1972 S30 240Z rebuild project - Page 18 - Project Datto

Z-Type Fenders – Hitechelastomers

Roll Cage - Fabrication / Welding - HybridZ

Fender Replacement - SGH

Project Bob aka The Orange Crusher 240Z (front clip replacment