Goopy 13B Through-Studs

Goopy Performance Verified independent store

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Goopy Performance through-studs for Mazda 13B with 12 point nuts and washers For S6 and later engines or FD3S or 20B Cosmo Engines These studs go through the entire engine with a n ut on the front and on the rear 1/2" diameter with 1/2-20 thread pitch Black oxide coated 4140 chromoly steel Show more