TDi North Cylinder heads are sold on an exchange basis and will come complete with selected valves and valve-train to customers preference.


Cylinder Head Standard Refresh
All our cylinder heads are fully rebuilt and refreshed, checked and skimmed as necessary. They will come de-carbed with new guides, seats re-cut to suit the valves, new Honda stem seals and new Honda LMA's fully assembled with selected valve-train.

Stage 1 Cylinder Head
As above with modified inlet ports

Stage 2 Cylinder Head
As Stage 1 but with modified exhaust ports

Stage 3 Cylinder Head
As Stage 2 but with port matched inlet manifold (Customer needs to supply for matching), 3 angle valve seats and de-shrouded valve heads (Dependent on bore size)


Standard Valves
Standard Honda K20 inlet and exhaust valves (Note that these may be re-used valves but fully checked before installation)

SuperTech Valves for NA applications
Supertech stainless steel black Nitrided Honda K20 inlet and exhaust valves - Standard size

SuperTech Valves for Boosted applications
Supertech stainless steel black Nitrided Honda K20 inlet valves and Inconel exhaust valves - Standard size


Standard Valve-springs, bases, retainers and collets
Standard Honda K20 

Toda Valve-springs, Standard Honda bases, retainers and collets
The need for increased performance has led TODA Racing to design a single progressive coil spring to replace the standard double valve springs. As well as allowing valve lifts of up to 13.00mm, the material and the coil springs natural frequency have all been optimized. Ideal also for Drop-in camshafts for people wanting to be able to extract power to higher rpm than the standard valves will allow.

SuperTech Dual Valve-springs, Supertech dual bases, Ti retainers and collets
Supertech dual valve springs are designed and manufactured to reduce valvetrain harmonics, increase durability, and provide an increase in performance for your high performance racing engine. All their dual valve springs are manufactured using superclean chrome silicon vanadium alloy and then heat treated, stress relieved and shoot peened to help improve the fatigue life of the spring. Springs we use are rated to 95lbs but ratings are available at 80lb, 82lbs and 97lbs. Springs come complete with matching Supertech bases, retainers and 7' collets

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