Supertech Valve Spring Kit - 1990-2005 Mazda Miata (NA/NB) 1.6L / 1.8L

Supertech valve spring kit with titanium retainers, single or dual springs. Valve locks are required for any NA6 or NA8 head using these valve spring kits. Choose "Included" to add 2 sets of 16 Supertech valve locks.

Supertech's ratings:
1990-1993 (1.6L) Single - 65 lb: 65 lb @ 33.6 mm seat, 158 lb @ 10.0 mm open, 9.60 lb/mm
1990-1993 (1.6L) Dual - 74 lb: 74 lb @ 35.0 mm seat, 195 lb @ 10.0 mm open, 12.10 lb/mm
1994-2005 (1.8L) Single - 63 lb: 63 lb @ 33.6 mm seat, 157 lb @ 10.0 mm open, 9.60 lb/mm
1994-2005 (1.8L) Dual - 75 lb: 75 lb @ 33.6 mm seat, 170 lb @ 10.0 mm open, 9.60 lb/mm
1994-2005 (1.8L) Dual - 85 lb: 85 lb @ 33.6 mm seat, 205 lb @ 10.0 mm open, 12.10 lb/mm