GMR - Graham Martin Racing

10/06/2026

When the owner of this stunning Alfa Romeo asked if we could build a custom DCOE airbox, the answer was simple: yes — done properly.
A few small design tweaks, sign-off from the customer, and we manufactured the airbox to fit his combination exactly — ready in time for his event at Goodwood.
No universal-fit shortcuts. Just a part engineered around the car. Need something bespoke for your build? Get in touch.

05/06/2026

Can anyone guess the car AND the engine combination?

03/06/2026

Performance engineering isn’t a buzzword—it’s a discipline. It blends data, validation, and systems thinking to turn design intent into measurable gains in power, response, durability, and packaging. From induction and airflow to calibration strategy and race-ready component design, it’s how serious teams compress development time and stay competitive under pressure. If you want motorsport-grade results with manufacturing-backed ex*****on, you’re already in the right mindset.

01/06/2026

Some things are easier to show than to describe. In images: four differences between GMR components and our competitors — and why each one matters.

29/05/2026

Just going to leave this here.....

Scanned, designed, manufactured and running in less than 8 working days. Ok they're not all like that and it is easier when you have a pre-existing design to iterate, but.....you get the point.

25/05/2026

Another great sprint weekend for Round 2 of the Javelin and Japanese sprint series.

1st in the Japanese GT500 class, 2nd in J2 of Javelin Sprint series and 9th overall.

More importantly the car is back to it's best, watching back the in car video it's so well behaved and if I wasn't so rusty it would be so much faster!

Amazing day if a little too warm but great to chalk up more miles on our GMR components.

More upgrades in the works hopefully ready for Cadwell in ~6weeks.

Watch my in-car here:
https://youtu.be/uOrMfvdq-RA

15/05/2026

We’ve been quiet because we’ve been busy.

Plenty of GMR airboxes have been heading out to customers over the last couple of weeks, and now we’ve got this beautiful Peugeot 306 GTi6 in for a full ITB kit and calibration — freshly back from the Green Hell.

Our Peugeot 205 GTi6 ITB kit was developed around our own test car, where packaging is properly tight. The 306 gives us a little more underbonnet space to work with, so we’re taking the opportunity to optimise the kit specifically for the 306 installation.

Our development process is simple:

Strip it.
3D scan it.
Drop in the CAD models.
Check the fitment digitally.
Manufacture the parts.

No guesswork. No templates. No “close enough”.

Just proper scan-to-CAD engineering.

Optimised 306 GTi6 ITB kit coming soon!

07/05/2026

New product alert! Firstly we've confirmed the fitment of all our GTi6 product on to the Mi16 engine. The o-ringed sealed manifolds will fit directly after the removal of the intake manifold dowels.

We've added the shorter variant of the GTi6/Mi16 manifold that goes with our DCOE type airbox specifically designed for the Peugeot 205/306 to clear the bonnet.

Oh and to top it all off, when you combine the intake manifold and airbox on your GTi6 or Mi16 you'll be reducing the weight of your setup by 600g!

It looks amazing here in Matty Fox's 205 engine bay!

https://gmracing.co.uk/product/peugeot-gti6-xu10j4rs-mi16-xu9j4-short-dcoe-manifold/

https://gmracing.co.uk/product/peugeot-205-306-gmr-airbox-for-jenvey-dcoe-type-throttle-bodies/

03/05/2026