MODIFIED STANDARD BLOCK

We can modify your 100/4 block to 100/S specification, relocating water and oil ways to comply with the 'S' spec cylinder head.

Please enquire for further details.

100/S ALUMINIUM CYLINDER HEADS

We have made these with the use of the original works pattern equipment. We then heat treated and fully computer machined them. They are made to the original dimensions and specifications and very similar to the Peter Jaye reproduction heads. They are fitted with precision ground, replaceable, lead-free valve seats of the latest material and complemented by our top quality valves, guides, springs and top caps. Available in two specifications. Standard complete with valves, guides, springs and top caps etc but not assembled or fully gas flowed, again with all the bits but also assembled ready to fit. There is a choice of 7/16" or 1/2" diameter head stud holes, please specify when ordering.

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VALVES

Made from one-piece forgings in 214N stainless steel with stellite tips and tuffrided. Suitable for both leaded and unleaded fuel. These are made to the lightest design using Buloc type collets, 5/16" diameter stems and original head diameters.

COLISBRO-BRONZE VALVE GUIDES

These are essential in all engines with gas flowed ports whether aluminium or iron and engines converted to lead-free fuel. They are specially manufactured for us to the same standards as used by F1. With original ½" outside diameter and to suit 5/16" valve stems.
Prices stated are per item

COMPETITION VALVE SPRING SET

Double spring set

VALVE SPRING CUPS

Hardened steel cup to locate the spring around the guide
Price stated is per item

LIGHTWEIGHT VALVE TOP CAP SET

Aluminium hard anodised light weigh top caps

COLLETS

Buloc type collets to suit 5/16" diameter valve stems.
Price stated is per half

VALVE STEM OIL SEALS

These are top-hat type seals which fit around the top of the valve guide to suit 5/16" diameter valve stems.
Price stated is per item

CYLINDER HEAD STUD AND NUT SET

These are manufactured from the highest grade steel and heat treated in order to have a great resistance to stretching and therefore, with the special nuts that are supplied, helps reduce head gasket problems.
SENG561 1/2" diameter
CENG561 7/16" diameter