True Roller Timing Set -

The CLOYES True Roller Timing Set (CLO9-3610TX3) is a premium race-grade timing chain assembly engineered for big block Chevy engines that demand precision ignition control. This double roller timing set serves high-performance builders and experienced mechanics who recognize that stock timing components cannot withstand sustained RPM spikes, aggressive valve timing events, or forced induction loads. The 3-keyway adjustable design allows fine-tuning of cam timing relative to the crankshaft, a critical advantage when optimizing fuel mapping and ignition curves on modified engines.

Built from iron and steel materials with true roller chain construction, this timing set eliminates the friction losses and deflection inherent in simpler designs. The double roller configuration distributes load across a larger contact surface, reducing wear rates and extending component lifespan under track duty or street strip use. The integrated thrust bearing maintains precise crankshaft endplay control, preventing the excessive axial movement that destabilizes bearing clearances and accelerates failure in high-boost or nitrous applications. The adjustable keyway system accommodates multiple cam timing offsets, enabling tuners to dial in optimal overlap and intake valve opening events without requiring custom crankshaft work.

Big block Chevy engine builders—particularly those running 427, 454, or 496 displacements with solid lifter cams—benefit most from this timing set's durability and adjustability. Installation requires proper crankshaft and camshaft endplay verification and alignment, tasks best performed during full engine assembly or during a lower-end rebuild. The 3.8 lb weight and compact 7.6 x 7.7 inch footprint integrate seamlessly into standard big block Chevy timing cover configurations, making this kit compatible with both original equipment housings and modern aftermarket covers designed for race applications.