A-SD 12G940RS (RoadSport) Cylinder Head
35.6 x 29.3mm Chrome Stem Valves with Cast-Iron Valve Guides.
This head is used on our 1047RS and 1150RS packages and is a superb for fast road and track day use. 12G940RS is fitted with 180lb double valve springs, meaning this head can withstand frequent / continual peak RPM limits of 6,500 and 0.475″ Valve Lift. The gifted hands at A-SD have captured the true desires of RS, Built to true Road Sport specifications, to maximise on-road performance, Holding good drivability for those using mild – fast road camshafts. Genuine AE lead-free exhaust seat inserts are fitted. High quality cast iron guides are used along with the latest specification chrome stemmed standard MG Metro valves (35.7mm inlet and 29.3mm exhaust) 9-stud fitting as standard (Converted to 11 Stud for our RS Packages)
Optimised torque out-put is attained through port shape, Dimension development and valve throat shapes developed to work with the mild-fast road camshafts. Select our CamalotRS for the ultimate road package.
A refundable surcharge of £100 applies. Heads supplied as exchange units must be in good re-workable condition with no cracks, in completely standard form and complete with valves, springs, top caps and collets.