Here at Gradient Engineering Ltd, we specialise in the Design and Engineering of Automotive Inlet Systems. Including Direct to Head Individual Throttle bodies and Fuel-Injected inlet manifolds and plenum chambers. We also design Engine Components for Motorsport and high-performance vehicles.

Established by a group of passionate motorsport enthusiasts Gradient Engineerings primary goal is to deliver high quality, high performing products at competitive prices. Our current product range includes individual throttle body kits that mount directly to the head making them tailored to that specific engine as well as being simple to install.

Gradient Engineering’s 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.

Direct to head individual throttle body arrangements have some distinct advantages over the more traditional DCOE replacement type throttle bodies. The main advantages are that they provide the most direct path for the air to travel with no direction changes needed within the flow path. The inlet length can be reduced for installations. The noticeable benefits are that they produce more power and have a quicker throttle response.

Gradient Engineering’s 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 as required and by utilising modern advanced manufacturing techniques we are able to respond to customer requestions for new inlet designs and to accommodate new engines into our range quickly and accurately to produce cost-effective, high performing inlet systems that work.



Some of our latest products

MX5 mk2.5 Throttle Bodies & ECU Package

Fits Mazda MX5 mk2.5 1.8 engines

MX5 mk2.5 Throttle Bodies, ECU & Injector Package

Fits Mazda MX5 mk2.5 1.8 engines

RS Turbo Inlet System

Direct fit inlet for Escort & Fiesta RS Turbo

Zetec Full Throttle Bodies, ECU & Injector Package

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

7 Port Sensor Block

Billet Aluminium Sensor Block

  • 5 ports – threaded 3/8″ bsp
  • 2 Ports threaded 1/2″ bsp

Available in a range off colours

Universal Top/Bottom Feed Inlet Plenum Chamber

Universal Billet Inlet Plenum Top/Bottom feed

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…

Get in Touch

Find us at the office

20 Spa Lane, Hinckley, Leicestershire, LE10 1JB

Give us a Ring

01455 891321

See us on Social Media

Contact Us


Welcome to Gradient Engineering, we are still open and operating as normal as possible given these unprecedented times. However, we are experiencing some delays in receiving components from our manufacturers who are working with reduced staff and also, rightly so,  prioritising work for their medical clients. Therefore we can still take orders for our products and we aim to deliver these as soon as possible.  Our team are still working to answering all inquiries and providing the advice and service expected. Please feel free to contact us through email, or phone 01455 891321.

We thank you for your continued support and wish you all well.

The Gradient Engineering Team