Lotus Twin Cam Weber Cylinder Head, Race Port w Seats and Guides

Replace your tired and worn Lotus Twin Cam cylinder head with all new casting designed and produced to the highest modern standards. This head is cast from modern LM25TF aluminum and like all modern engines, separate camshaft bearings are not required. Each head includes valve seats and Colsibro valve guides for years of trouble free service. CNC machined combustion chambers ensure matching volume across all four cylinders. This head is set up for "Race" intake and exhaust valves. We can also provide heads fully assembled. contact us for details.

LOTUS TWIN CAM RACE SPECIFICATION

• New LM25TF Casting to original dimensions
• Cam bore machined into head (No cam bearing required)
• Inlet port CNC ported  1.3" diameter 45mm Weber at manifold
• Inlet Valve seat cut for 1.625 diameter valve- (Inlet valve not included) 
• Exhaust port CNC ported to 1.25 dia
• Exhaust valve seat cut for 1.4 diameter valve - (Exhaust valve not included)
• Colsibro valve guides fitted finished for 5/16 valve stems
• Combustion chamber machined 
• Spark plug 10mm 
• All core plugs fitted
• Full pressure test 
• Head supplied fully machined with valve guides and valve seats cut and cam caps 
• Cam cap studs and fasteners included
• Head height 4.640" 
• Made in the UK

Applications:

All Lotus Twin Cam Engines