Gradient Engineering Ltd specialise in the design and Engineering of inlet systems, direct to head, fuel injected, individual throttle bodies and engine components for Motorsport and high-performance vehicles

Our current product range includes individual throttle body kits that mount directly to the head making them tailored to the engine and simple to install. Our throttle bodies can also be tailored to fit virtually any engine and customer requirements. They are a no-compromise design that ensures that whatever engine they are fitted to they provide optimum airflow to maximize engine performance.

The advantages for direct to head individual throttle bodies include;

  • Increased airflow to the cylinder
  • Faster throttle response
  • Tunned inlet length to meet engine performance requirements
  • Port injection for improved fuel mixing

Our bodies are made from billet Aluminium, CNC machined for precision and flexibility in allowing them to be customised to suit individual requirements, therefore we can offer custom inlet systems utilising our modular bodies for cost-effective custom intakes for many different engines.

We use the latest in CAD simulation to design our inlet systems to ensure they will perform and by utilising modern advanced manufacturing techniques we can produce cost-effective, high performing products that work.


Our racing team runs a highly modified Ford Fiesta XR2i in the BARC North Western Sports and Saloon Car Championship sponsored by CNC heads.



A selection of our products

Ford Zetec Direct to Head Throttle Body Kit

Fits Ford Zetec 1.8 & 2.0-litre ‘silver top’ engines


Ford Zetec DTH Throttle Body & S40PRO ECU Package

Fits Ford Zetec 1.8 & 2.0-litre ‘silver top’ engines

Ford CVH Direct to Head Throttle Body Kit

Fits the 1.6-litre engine commonly found in Fiesta & Escort RS Turbo & XR range

Ford CVH Roller Rockers

Roller Rocker Arms for the Ford CVH range of engines.

The people behind the products
Paul Griffin - Managing Director

Paul Griffin

Managing Director

Paul is a passionate engineer and is the driving force behind the design engineer and has developed all of the products currently in our range. He is also the driver on race weekends

Paul Clarke


Paul is a keen pretrol head and can fix most things automotive, he is our cheif mechanic on race weekends.

Andrew McManus

Race Support

Andrew is a motorsport enthusiast who like rallying, he is assistant Mechanic and support at race weekends, he makes a good cuppa tea

Neil Griffin

Race Support

Neil is another motorsport enthusiast and enjoys his motorbiking. He is our strategist and assistant mechanic on race weekends


Our Latest News and Reports

CVH Roller Rocker

After years of working on the design, finding manufactures and building a brand I’ve finally achieved my dream of making my own roller rockers for my race engine. I started looking for some roller rockers Read more…

CVH XR2i Head Setup

During our time racing we have had a few DNF’s due to a cam follower adjusting itself by allowing the bolt to be wound in, therefore we needed a remedy to stop this from happening Read more…

Get in Touch

Find us at the office

20 Spa Lane, Hinckley, Leicestershire, LE10 1JB

Give us a Ring

01455 891321

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