At Gradient Engineering Ltd we specialise in creating high-performance, Motorsport orientated Inlet Systems, Individual Throttle Bodies and engine components.

These include;

  • Direct to Head Individual Throttle Bodies
  • Fuel-Injected Inlet Manifolds
  • Plenum Chambers
  • Roller Rocker Arms

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

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 that isn’t 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

Throttle Position Sensor (TPS) Clockwise

VTP11 Throttle Position Sensor, clockwise rotation

Zetec Turbo ITB Inlet System

Direct fit inlet for Escort & Fiesta RS Turbo

Ford Zetec ST170 Individual Throttle Bodies – Direct to Head

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 CVH Roller Rockers

Roller Rocker Arms for the Ford CVH range of engines, as fitted to may engines including the Escort RS turbo, XR3i, XR3 and RS1600 plus the Fiesta RS turbo and XR2, XR2i

Ford Zetec Turbo Inlet System

Taking orders for a batch of 5+

Zetec Turbo Inlet Manifold and Plenum Chamber


Ford Focus Mk3 RS & ST Inlet Manifold

Allow 2-4 weeks for delivery

A high-performance billet inlet manifold for the Mk3 Ford Focus Ecoboost 2.0 and 2.3 performance inlet manifold as found in the MK3 Focus RS and the MK3 Focus ST models. (2012 – 2018)

Key Features;

  • Increase in power and Torque
  • Choice of Colours
  • Direct replacement for the original
  • 4 port methanal / nitrous injection points
  • Optional 4 …
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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