Caterpillar's legacy in heavy equipment extends to a range of truck parts and filters trusted by fleets running older Peterbilt models with CAT engines. Cat-branded filters, fluids, and maintenance components meet stringent performance specifications and are designed to protect engines operating in extreme duty cycles. Whether you're servicing a classic Peterbilt with a C15 or C16 under the hood or sourcing Cat-compatible maintenance supplies, this collection has you covered.