Prevention Is Key.
The Fuji Racing billet camshaft pulleys are manufactured right here in the UK, using aerospace quality 6082T6 alloy as the base. Each pulley is machined from a single block of alloy using a state of the art multi axis CNC machine. Each pulley is then gear cut using a traditional gear shaper rather than milled, this offers a perfect belt tooth shape every time. Each pulley is then hard anodised unlike others on the market, not only does this help strengthen the top layer of alloy it also helps prevent timing belt tooth wear. Then finished off using a fibre laser machine to laser engrave precise timing marks and the Fuji Racing logo as a seal of approval. Each pulley is compatible with the OEM pulley removal tool too.
The original Subaru camshaft pulleys are made from bakalite plastic, which over time gets brittle due to engine temperature cycles and eventually breaks causing catastrophic engine failure. These pulleys are now over 20+ years old and seem to fail more often after a timing belt replacement, this can be caused by extra strain on the pulleys due to the tighter timing belt, or if the pulleys haven’t been removed correctly during an engine build or camshaft seal replacement. We recommend these are fitted at the same time as the timing belt.