Build or rebuild your Triumph TR3’s engine with our huge range of components covering everything from Arrow Precision billet crankshafts to standard replacement gaskets.

The range splits into five key areas: cylinder heads with valves and springs, internal engine parts like pistons and bearings, external components including sumps and water pumps, camshafts and timing gear from mild road to full race spec, plus flywheel and clutch assemblies.

Each TR3 engine component meets the tolerances needed for proper oil pressure, correct compression, and reliable operation across the rev range.