MX5 Shop (new) › Frost Plugs Image 1 of 2 Image 2 of 2 Frost Plugs from $3.70 30mm & 35mm frost plugs - Genuine Mazda for NA & NB Size: Select Size 35mm 30mm Add To Cart Added! 30mm & 35mm frost plugs - Genuine Mazda for NA & NB You may want to see this... NB2 VVT Rebuild Kit $68.21 Gasket, throttle body to inlet manifold, NA8, NB6, NB8 $7.83 NA8/NB (7") Diff pinion seal $26.45 Cam Shaft Seal - VVT NB2 $33.20 NB8 VVT Engine Sump End Seals $38.35