Typical aftermarket exhaust manifold bolts are much shorter than stock which after numerous heat cycles can cause them to fatigue and start to stretch, leading to exhaust leaks and possible breakage after repeated re-torques. The finish and coating on most of these bolts can also lead to premature corrosion and zinc embrittlement. Replace damaged or corroded exhaust manifold bolts with BD's class 10.9 bolts and spacers which improve thermal durability to stand up to the heat and non-Zinc plated fasteners prevent zinc embrittlement.. Exhaust spacers ensure fastener operates in elastic stretch without fracture or permanent yield. Exhaust Manifold Gasket Set; Incl. 16 Pieces 18mm Spacers/40 mm Flange Head Exhaust Bolts;. BD Diesel 03-07 Ford F250/F350 6.0L PowerStroke Exhaust Manifold Bolt and Spacer Kit. BD 6.0L PowerStroke Exhaust Manifold Bolt and Spacer Kit - Ford 2003-2007 F250/F350. BD 6.0L PowerStroke Exhaust Manifold Bolt and Spacer Kit Ford 2003-07 F250/F350. Operates In Elastic Stretch Without Fracture Or Permanent Yield. Qty 16 flange head exhaust bolts (M8x1.25 - 40mm 10.9). Non-Zinc-Plated Fasteners Prevent Zinc Embrittlement. EXHAUST MANIFOLD BOLTS & SPACERS KIT 6L. Qty 16 exhaust spacers (18mm). Exhaust Manifold Gasket Set. Exhaust Manifold Bolt. Class 10.9 Hardware. MANIFOLD BOLT KIT. ExhstMnfGsktSet

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