CST2004, Stage 3 cylinder head, small-bore up to +40



Price - £795.00 + VAT

Surcharge for casting if not supplied - £125.00 + VAT. We now urge all UK based customers to try and source/supply their own castings as buying used core in reasonable quantities with the majority in usable condition is becoming very rare.

Super sport spec cylinder head -
Inlet valves: 30,93mm
Exhaust valves: 25,4mm
Guides: Bronze to CST shape fro application.
Stem seals: Sprung Viton type on all 8.
Valve springs: Bespoke to camshaft spec being used.
Top caps: Standard.
Collets: Standard
Chamber capacity: Bespoke to suit application.

This specification of cylinder head is for the small-bore based engines with up to +0.040”/1,0mm bore sizes. The smaller bore sizes limit the size of the exhaust valve. Based on used core castings it is modified to CST current conventional road-sports style to maximise road-sports and track day/weekend-warrior performance when used with road-sports and super-sports camshaft specifications. That means optimised BHP and torque out-put through port shape and dimensions and valve throat shapes. Developed on an airflow bench and then on engine dyno/rolling roads to work with the aforementioned camshaft types along with suitable compression ratios given modern lead-free fuel specifications. High quality Serdi lead-free exhaust seat inserts are fitted.

All cylinder heads are done to order as I have always more heads on order than I can ever hope to catch up with to produce stock for the shelf.

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