At Gradient Engineering Ltd we specialise in creating high-performance, motorsport orientated Inlet Systems, Individual Throttle Bodies and components for competition engines.

These include;

Established by a group of passionate motorsport enthusiasts Gradient Engineering’s primary goal is to deliver high quality, high performing products at competitive prices.

Developed in competition our range of Individual Throttle Bodies (itb’s) help to release the power from your engine.

Feel in control, confident and connected with faster throttle reponse, awesome sount and stunning looks. Throttle bodies don’t have to be only for the track, get that sports car spirit from a rawer driveing experince and the emotive sounds unique to individual throttle bodies.

We pride ourselves on being customer-focused and we can tailor any of our inlets to be as individual as you are, whilst still performing at their best. If we don’t have anything thats is suitable we will happily create a whole new system dedicated to your requirements quickly and cost-effectively.

Our attention to detail and no-compromise, innovative designs allowing us to create billet aluminium, CNC machined products to suit virtually any engine or vehicle. 

Why settle for a compromise when you could release the full potential in your engine.


Some of our latest products

Mitsubishi EVO 4-9 ITB Inlet System

Direct fit inlet for Mitsibushi Evo 4, 5, 6, 7, 8 & 9

* images for illustration purposes only

Zetec Turbo ITB Inlet System

Direct fit inlet for Escort & Fiesta RS Turbo

Ford Zetec ST170 Individual Throttle Bodies – Direct to Head

Please allow up to 6 weeks for delivery

Zetec Direct to Head throttle bodies for 2.0 ST170 engines

Available in a range of sizes and lengths to suit a variety of engine performance requirements.



Ford Pinto Direct to Head Throttle Bodies

Direct to Head Throttle bodies 45mm suit the Ford Pinto engine as found in the Ford Sierras,  Escort RS2000, plus many kit cars.

Please allow 4-6 weeks for delivery

RS Turbo Inlet System

Direct fit inlet for Escort & Fiesta RS Turbo

Ford CVH Direct to Head Throttle Bodies 45mm

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

Mazda MX5 1.8 BPZE Individual Throttle Bodies

Direct fit onto the Mazda MX5 mk2.5 1.8 BPZE engine.

The kits come complete with;

  • 4 Throttle bodies
  • Mounting flange
  • Trumpets

*  Images for illustration only

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 designs and engineering having 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 chief mechanic on race weekends.

Andrew McManus

Race Support

Andrew is a motorsport enthusiast who likes rallying, he is an assistant Mechanic and support on race weekends, he also 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

What our customer say

"Blown away " & "Lost for Words!"

on a set of CVH Turbo throttle Bodies

"I am very happy with them! They look super cool"

a customer on receiving their Escort RS Turbo Inlet System

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

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