Special Projects
Low-volume production and one-off engineering for motorsport & OEM.
High performance engineering — without compromise
Engineered to win.
Throttle bodies, manifolds and bespoke components — designed and manufactured in-house in Northampton.
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components in catalog
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stocked variants
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stack configurations
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designed & made in-house
// 01 · The flagship
Complete ITB kits, engineered for your engine
Not a box of universal parts — a complete induction system: throttle bodies, manifold, stacks, linkage and filtration, sized from your displacement, head and target RPM. Designed as one system, because that's how the air sees it.
Throttle Body Kits
Honda K20 Race/Kit car ITB Kit
Advanced Carbon Composite ITB kit Manufactured using Carbon IDT, (Carbon Infused Digital Technology), high-strength carbon composite, this intake system kit is super lightweight and exceptionally insulative. Our Honda K20 kit requires no disassembly of our kit before bolting onto the engine. (Remova
from £1200.00
View the kit →
Throttle Body Kits
Peugeot 205/306 GTi6 Mi16 ITB Kit
Performance Advantages Unlock up to 20% more power potential with appropriate engine setup and calibration Reduce intake air temperatures by up to 15°C under typical operating conditions through thermally insulating carbon construction Fully tapered runners improve airflow stability and cylinder fi
from £1200.00
View the kit →Your platform not listed? Bespoke kits are core business — talk to us.
// 02 · Why GMR
The unfair advantages
∞design freedom
Internal geometry — without the tooling limits
Cast and machined components inherit the limits of their tooling. Our digital-first process doesn't. The flow path inside a GMR part is the one the engineer designed — not the one the tooling allowed. Compound curves, true radiused entries, section changes exactly where the airflow wants them.
0lighter than aluminium
Up to half the weight
Carbon composite construction delivers components up to 50% lighter than their aluminium equivalent. Less mass on the engine, less weight over the front axle — weighed, not claimed.
0better heat insulation than metal
Hollow carbon composite walls
Metal manifolds soak engine-bay heat straight into your intake charge. Carbon composite is up to 5,000× more effective at preventing heat transfer — the charge stays cooler and more consistent, and cooler air is denser air. That's power you keep on lap ten, not just lap one.
View the data: CF polymer vs aluminium under airflow →DAYSnot months
Toolless manufacturing
Every component is built directly from its digital design — no casting patterns, no tooling spend, no minimum runs. Production takes days, not months. And because there's no re-tooling cost, genuine customisation for your engine is the default, not a premium.
// 03 · The point
Area under the curve
A headline peak figure is marketing. Area under the curve is performance.
Bore sizing matched to your displacement and target RPM. Stack lengths tuned for where you actually drive. Runner geometry the tooling can't veto. That's how you buy mid-range you can use at every apex — not a dyno screenshot.
See a real pull: customer dyno sheet → Build yours →// 04 · Pedigree
Forged in F1 & WTCC
Before GMR, this engineering ran at the sharp end of motorsport — Formula 1 and the FIA World Touring Car Championship, where a part either performs under data scrutiny or it doesn't exist. That's the standard your induction system is built to. Same engineer. Same numbers-first discipline. Your engine.
// 05 · In the wild
Latest from our socials
Live from the GMR workshop — follow along on Instagram & Facebook.
// 06 · Made to order, live
Watch a part take shape
THE REAL PART — drag to rotate, scroll to zoom.
£ —
PART Nº —
This is how every made-to-order GMR component works: your spec resolves to a unique part number, priced live, built on our DDM line. Shown here: a velocity stack.
Configure & order →// 07 · Catalog
Featured components
3d Printing Filament
GMR PPA-CF
GMR-M-00021£84.99
Accessories
GMR Air filter
GMR-A-55£50.00
Accessories
GMR Throttle Body Idle Vacuum Manifold
GMR-A-00053£95.00
Accessories
IAT Sensor M10
GMR-P-00038£24.95
Air boxes
GMR Airbox for Jenvey & DCOE type throttle bodies
GMR-A-54£200.00
Air boxes
GMR Airbox for Jenvey OBX SF Type Throttle Bodies
GMR-A-57£200.00
Air boxes
Peugeot 205/306 GMR Airbox for Jenvey & DCOE type throttle bodies
GMR-C-00069£200.00
Injectors
Bosch EV14S 550cc Injectors
GMR-P-0280158117£60.00
// 08 · Capability
Services
Reverse Engineering
Scan, model and recreate obsolete or bespoke components.
Direct Digital Manufacturing
Additively manufactured parts, production-ready and made to order.
Custom Race Engines
Bespoke engine & component manufacture and calibration.