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Aluminium Cylinder Heads

Third version of Cougar Red's popular heads but with TTW input.
They are now stronger all over and use smaller 2mm o-rings for better sealing.
The combustion chamber is TZ style - good for high squish velocity.
The angled squish band on the std inserts is cut at 0.65mm which when added to the deck height gives a good squish gap for most std bikes. (The gap should be double checked at fitment to ensure it is between 0.8 - 1.0mm)
The volume is suitable for unleaded petrol.
The water spigots are of a threaded design and are supplied pre-fitted and sealed unlike other manufacturers offerings.
As before there is increased cooling capacity and you will see a significant power increase over std heads.
The plug is straight cut and therefore a slight modification to the front fairing may be required for access.
Anodised in deep attractive black.
Seals are included.
Special or blank inserts can be made at extra cost.
Adjust squish to suit fuel while checking volume for safety - special inserts can be made to your specification.
Volume Info:

Approx Volumes as follows:

11.1cc with 1.0mm squish

9.5cc with 0.8mm squish

All volumes include the plug hole. Roughly 1.9cc less for true volume, with the plug fitted.

If squish width is changed by 0.1mm, this would change volume for 250 insert by 0.25cc roughly, and for the 300 insert it would roughly be 0.3cc



Special clause for parts made by Cougar Red: These parts or kits are designed and manufactured for competition use and are sold "as-is without warranty". The entire risk as to performance and quality is with the with the buyer. It is a condition of our making these parts available that it is solely the decision of each individual, rider, team member or team whether they choose to use any parts supplied and in doing so this absolves The Tuning Works & Cougar Red of any claims including and not exclusively for; inconvenience, damage to equipment and/or injury to personnel irrespective of how caused. Parts are sold strictly for motorsport use. Use on road may violate local laws and parts are therefore fitted to road going vehicles entirely at the owners risk. If you wish to return this product for a refund you must notify TTW within 7 days of receipt and the parts must be in original unused condition. It is assumed when ordering or fitting these parts that you accept these terms.
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I bought these heads last year and they are absolutely fantastic! The finish is superb and I have had no issues at all. They gave a noticeable power boost and the temperature is a constant 60 degrees. No more messing around with expensive leaky head gaskets. Sean is always more than helpful and I shall return soon to buy the Cougar Red power valves!

Rated by Jon Robertson

I have the Mk2 AvGas version of these heads fitted to my Land Speed VJ22 and I am more than satisfied with them. They are beautifully engineered, simple to fit and complement the other modifications I have done to my Engine. These Cylinder Head allow me to run repeated detonation free sustained WOT peak RPM passes over the 2 mile course I run on. If you have a modified RGV or Aprilia RS these Heads are about as good as you can get off the shelf.

Rated by Peter Healy


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