Weld in Magnesium Anode and aluminum threaded bung.
Aluminum panels that force all the air that goes through the grill to be forced through the radiator and not around it.
This is the biggest, baddest radiator you can stuff in a Miata! This is really one of the must haves if you want to make power.
Protect your expensive radiator! Stainless steel 1/4" mesh grille cover that fits in the stock Miata grille opening and will protect your radiator from on track debris.