Cylinder head

Jaguar: E-Type 3.8 Series 1 (1961-64) • XK150S 3.8 (1958-61) • XK150S 3.4 and 3.8 with electrical tachometer from May 1959: OTS from 820043 (RHD) and 832088 (LHD), DHC from 827373 (RHD) and 838272 (LHD), FHC from 824905 (RHD) and 836233 (LHD)

new twin spark straight port head with valves, springs and guides, cam bearings and new camshafts. Supplied with hardened exhaust seat inserts for lead free applications

The newly developed Twin Spark cylinder head has been specifically designed for the Jaguar connoisseur who desires truly modern performance and everyday drivability from his Classic Jaguar without violating the authenticity of his vehicle. All of the original limitations have been overcome: Each combustion chamber is now properly centered over each bore. The ports have been reshaped to provide the best possible flow. The compression ratio and squish area are substantially increased. Two spark plugs greatly improve combustion efficiency. These features are all contained beneath the period appearance of the original head. 3D sand molds produce an aerospace quality component.
The Twin Spark cylinder head properly aligns each combustion chamber with the bores of the block.