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SKU: OEM-611
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New exhaust manifold stud or nut for 1990-2005 Miata 1.6L and 1.8L. 1.6L used the nut and washer combo and 1.8L used the single locking nut. Either style can be used on all years. Choose from OEM Mazda and aftermarket options.
A: OEM Stud M10 Thread
B: OEM locking nut, M10 fine thread
C: OEM nut, non locking, M10 fine thread, use lock washer "D"
D: OEM lock washer if using "C"
E: Aftermarket copper locking nut, M10
F: Aftermarket steel lock nut, M10
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