Cylinder Heads

Our range of cylinder heads are proven on the track, street,

strip & dyno.

Cylinder heads for turbo & supercharged engines.

 Below is our range of cylinder heads, suitable for both Turbo & Supercharged application.
All heads feature brand new 21NS stainless steel race quality valves, new silicone bronze bulletnosed guides, new double valve springs & new valve stem oil seals. All heads are refaced, painted & ready to fit.

All heads are modified to suit your application, or can be done to your own specification.
If you require something different please contact me for a quote.

Please email for further details: cylinderheads@turbo-mini.com 
Postage & Packaging on all heads is £20.00 {in the UK}, for other countries please email for a quote.

Surcharge for head casting if not supplied: £75

Fast Road/Trackday.

Ideal for fast road/trackday applications where the use of unleaded fuel is required.
Fitted with nitrided 21NS stainless race quality valves, bulletnosed manganese silicone bronze guides, double valve springs and viton stem oil seals on the inlets.
This head features a larger 35.6mm intake valve with a 3 angle valve seat & 29.4mm
exhaust valves, with hardened exhaust inserts allowing the use of unleaded fuel.
Based on the 12g940 casting. The head has fully modified inlet and exhaust ports, with complete guide boss removal to vastly improve airflow, the chambers are enlarged to deshroud the valves & lower the compression allowing the use of higher boost. Finally the head is refaced to ensure total flatness & is
 painted ready to fit.

Can be drilled for 11 stud on request.


PRICE: £650

Big Valve Offset Race.

A seriously modified head for serious power outputs.
Fitted with nitrided 21NS stainless race quality valves, bulletnosed manganese silicone bronze guides on the intakes with a custom oversize Colsibro guide for the exhaust, double valve springs and viton stem oil seals on the inlets.
This head features a larger 35.6mm intake valve, 3 angle valve seats with the exhaust valve & port offset to straighten the gas exit line & a 31mm valve fitted.
Based on the 12g940 casting. The head has a fully modified inlet port with a modified and offset exhaust port, with complete guide boss removal to vastly improve airflow, the chambers are enlarged to deshroud the valves & lower the compression allowing the use of higher boost. Finally the head is refaced to ensure total flatness & is
 painted ready to fit.

Can be drilled for 11 stud on request.

PRICE: £750 {Leaded only}

Performance cylinder heads for naturally aspirated engines.

Below is our range of cylinder heads, suitable for naturally aspirated applications.
All heads feature brand new valves, new guides, new double valve springs & new valve stem oil seals. All heads are refaced, painted & ready to fit.
All heads are fully modified with ported inlet and exhaust.

All heads are modified to suit your application, or can be done to your own specification.
If you require something different please contact me for a quote.

Surcharge for head casting if not supplied: £75
 

MPI Special.


Specifically developed for the late MPI engined Mini. The casting used is the correct type with the holes for the alternator mounting.
Nominal chamber volume is 21cc.
The 29.4mm exhaust valve is retained, while the inlet valve size is increased to the larger 35.6mm valve, with guide boss removal & port work on both the inlet & exhaust which vastly improves flow.
The inlet features a 3 angle seat & specially modified valve with a 30 degree back-cut for better flow. While the exhaust is single angle for maximum reliability & longlivety.
Based on the 12g940 unleaded MPI casting
the inlet & exhaust ports are fully modified with complete guide boss removal, the chambers are modified to deshroud the valves, the head is refaced to ensure total flatness & painted ready to fit.

Can be drilled for 11 stud on request.

PRICE: £580

Stage 3 Road.

A modified head with performance road use in mind. Suitable for mild camshafts where RPM is limited to 6,500 & good road manners & improved low end torque are the aim.
The head carries the same spec as the MPI Special, but is based on the standard 12G940 casting, with chambers sized to give the desired compression ratio.

 

PRICE: £580

Stage 4 Road/Race.

Suitable for fast road or race use.

Fitted with nitrided 21NS stainless race quality valves, bulletnosed manganese silicone bronze guides, double valve springs and viton stem oil seals on the inlets.
This head features a larger 35.6mm intake valve & larger 31mm
 exhaust valves with 3 angle valve seats, with hardened exhaust inserts allowing the use of unleaded fuel.
Based on the 12g940 casting. The head has fully modified inlet and exhaust ports, with complete guide boss removal to vastly improve airflow, the chambers are  shaped to deshroud the valves & improve combustion. The head is refaced to ensure total flatness & give the desired compression ratio & is
 painted ready to fit.

Can be drilled for 11 stud on request.

PRICE: £650

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