Billet oil caps
Machined from 6061 aluminum. Super lightweight design (3oz). Seals with a high temp Viton o-ring. Higbee (blunt) start and end on the threads for zero sharp edges, and no chance of cross threading. Tumbled to a semi polished finish and then anodized in your choice of clear(silver) or black. Caps are engraved before anodize for that stealth look. Limited run.
Mazda fitment M35x4 thread for most all Mazdas.
Nissan L-series fitment- M32x3.5 w/long threads and super low profile. (Also fits some Honda's)
Nissan newer RB KA SR fitment- M32x3.5 w/short threads and offset top to raise cap off valve cover seal surface.