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Developed in conjunction with the WRC engine valves, Roger Clark Motorsport have developed their own range of high quality uprated valve springs. These springs offer an increased spring rate over the standard genuine spring, helping to eliminate valve bounce at high engine revs. These springs have an unfitted length of 43.5mm, a coil diameter of…

RCM Titanium retainers, for use with our own double valve springs and the later style buckets with intergrated shims. This is for a set of 16 retainers.

RCM nitrided spring seat spacers for V3/4 heads only to be used in conjunction with the RCM double valve spring kit RCM906.

RCM nitrided spring seat spacers for V5+ heads.

This injector adaptor kit allows later V5-6 Injectors to be fitted into earlier V1-4 fuel rails. Injector not included with the adaptor kit.

RCM Camshaft Kits have been designed and developed in house, to ensure that they deliver the maximum power possible over a wide power band. Each Cam is precision ground and polished from a new blank to the same exacting standards and tolerances every time, ensuring you have the same quality Cams as you would see…

The RCM throttle wedge is a part which can greatly aid in reducing cost and time when installign a reverse facing manifold. Designed to be used on V7+ Manifolds, the wedge is designed to be welded directly onto your manifold, and allows the throttle come out at the correct angle facing forwards instead of upwards…

The RCM thermostatically controlled sandwich plate has been designed and manufactured so that the oil lines can be directed at multiple angles, this allows fitting with all variants of exhaust manifolds (including twin scroll, equal and unequal length). The integral thermostat opens at 85 degC, allowing ample time for engine temperatures to reach sufficient levels…

The RCM618 fitting kit would be used when fitting a complete 2.5″ exhaust system (all 4 parts) on a Euro spec new age Impreza (01/2000 +, or when fitting the RCM exhaust systems RCM634, RCM635, RCM 642 or RCM 643. RCM exhaust fitting kits provide all the necessary items needed to compliment and complete your…

This fitting kit would be used when fitting a complete 2.5″ exhaust system to a Japanese spec Impreza (not twin scroll), or when fitting the RCM exhaust systems RCM632, RCM633, RCM640 or RCM641. RCM exhaust fitting kits provide all the necessary items needed to compliment and complete your RCM exhaust part. Each kit comprises of…