SKU: MOR38560
UPC: 084663385605
MPN: 38560
The Moroso 38560 is a 22-piece self-locking oil pan bolt kit built for Big Block Chevy and all Pontiac V8 engines. It replaces the soft factory hardware that tends to loosen under heat cycling and vibration, giving the oil pan flange a consistent clamp load all the way around. This is the kind of part racers and street builders swap during an engine refresh, when they want fasteners that stay put. If you're going through the bottom end and want matched hardware, this set covers the full pan perimeter in one box. Browse our wider oil pan bolts selection for related fitments.
Each bolt in the Moroso 38560 kit is made from Grade 8 steel with a hex head, and measures 1 inch in length per manufacturer specifications. The standout feature is the integral serrated washer face, which bites into the pan flange and creates a self-locking effect without lock washers or thread sealant. That serration resists back-out under engine vibration, so torque values hold over time. The bolts carry a plated finish for corrosion resistance during long service intervals. With 22 bolts to a set, the kit matches the bolt count on a standard Big Block Chevy or Pontiac oil pan, so you're not mixing old and new hardware around the rail. For builders who also want a matched drain fitting, see our oil pan plug options.
These bolts make sense any time the pan comes off, whether you're chasing a gasket leak, dropping in a new oil pan, or doing a full rebuild. The self-locking face is worth it on engines that see high vibration and repeated heat cycles, where standard hardware works loose. Install them clean and dry, snug in a crisscross pattern, and bring them up to spec evenly so the gasket seats without distorting the flange. Pair the set with our other engine bolt kits when you're refreshing a Big Block, or check the full fasteners catalog for studs, washers, and related hardware.
This kit fits Big Block Chevy engines and all Pontiac V8s. The 22-bolt count matches the standard oil pan flange on those engines, so it covers the full perimeter without leftover or missing hardware.
Each bolt has an integral serrated washer face machined into the underside of the head. As you torque the bolt down, the serrations bite into the pan flange and resist back-out from engine vibration. You don't need separate lock washers or thread sealant.
The Moroso 38560 bolts are Grade 8 steel with a plated finish for corrosion resistance. Grade 8 offers higher tensile strength than the soft factory hardware it replaces, which helps maintain clamp load over heat cycles.
Each bolt measures 1 inch in length per manufacturer specifications, with a hex head for socket or wrench installation around the oil pan rail.
The serrated washer face provides the locking action, so additional thread sealant isn't required for retention. Install the bolts clean and torque them evenly in a crisscross pattern so the gasket seats without distorting the flange.
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