Lotus Twin Cam FIA Engine Upgrade Kit

The Lotus Twin Cam FIA package contains all the components you would generally need to upgrade to an FIA legal engine:

• Crankshaft – 72.75mm forged EN19 steel 4-bolt, 4-dowel rope seal (6-bolt lip seal available if legal for your car/championship)
• Con Rods – 4.826″ forged EN24 ‘I’ section (“GAF” type) with ARP bolts
• Pistons – 83.5mm or 83.65mm forged aluminium, high compression
• Valves – Long stem, sprint size inlet and standard size exhaust, stainless steel
• Cam Followers – Steel, thin pad (0.160″) with a longer skirt for added stability
• Race Spring Pack – including platforms, race springs, lightweight retainers and lightweight collets
• Camshafts – a pair of chilled cast Q450 or Q460 camshafts
• Flywheel – steel flywheel and ring gear (to suit a standard pattern 8.5″ diameter clutch)
• Spigot bearing, crank to flywheel and clutch to flywheel dowels

All of these components (aside from the American valve springs and rod bolts) are designed and manufacturered in the UK and have been used by our customers for decades with great success in historic FIA competition.