Description

The original Special Tuning head 8 port head by Jim Whitehouse is the ULTIMATE Push rod head for the "A"Series but is NOT A STRAIGHT BOLT ON PART. It is supplied fully assembled with springs/top caps and utilizes the original size 35.6 inlet and 30.88 exhaust valves and will handle cam lifts up to .500" Also in this kit is a set of correct length (.220"longer) push rods C-AEG583,plus the 4 front head studs 51K282 and manifold gasket C-AHT380. Standard con rods will need modification for clearance owing to cam lobe cofiguration. A set of con rods ready to fit are available. Special 8 port cams are required. Special exhaust manifold C-AHT343 is also required. Combustion chamber is approx 21cc to suit sensible compression ratios on big bore engines and from July 2010 the revamped head uses stepped guides which retain the valve spring platform as per all modern day race heads. A special set of 8 port hilift roller rockers in correct sequence and spacings are also available as C-AHT448 for this new head. A fully programmable injection management kit is available as C-AJJ4065 A super large 37.2mm inlet valve head for special uses and large bore engines is available to special order.