Engine

Rocker Arm Odd TR3 to TR4A

Aftermarket

Rocker Arm Even TR3 to TR4A

Aftermarket

Rear Spring Shackle Bushing Set Poly TR2-TR4

British Parts Northwest

Rear Seal Conversion Kit TR2 to TR4A

Aftermarket

Steering Rack Mount Set Poly TR4 to TR6, GT6, Spitfire

British Parts Northwest

Push Rod HD TR3-TR4A

Aftermarket

Piston Set 87mm TR3 to TR4A

Aftermarket

Piston Rings Set TR3-4A 86/87mm

Piston Ring Set TR3-4A 3-Ring

Piston and Liner Kit 89mm Triumph TR3, TR4, TR4A

Powertune

Piston and Liner Kit 87.5mm

Aftermarket

Piston and Liner Kit 86mm or 87mm