SHOP  

 SHOP  

CST2005, stage 3 cylinder head, small-bore +60 and over

£640.00
Quantity:
Price - £640.00 + VAT 
 
Surcharge for casting if not supplied - £75.00 + VAT 
 
Super sport spec cylinder head -  
Inlet valves: CST 31.75mm, single groove collet EN214N plasma-nitrided 
Exhaust valves: CST 27.18mm, single groove collet EN214N plasma-nitrided  
Guides: Manganese bronze 
Stem seals: A+ sprung on all 8, Viton material on inlets 
Valve springs: 180lb nominal dual coil, shimmed to correct fitted length 
Top caps: Standard 
Collets: Standard single groove  
Chamber cap: Tailored to suit application. 
 
This specification of cylinder head is for the small-bore based engines with +0.060”/1.50mm and over bore sizes. The larger bore sizes allow the use of a larger exhaust valve without the need to pocket the block to balance the use of larger inlet valve size. 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.  
 
Fitted with exhaust seat inserts for unleaded fuel compatibility. 
 
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.