GMR — Graham Martin Racing
Air boxes

GMR Airbox for Jenvey & DCOE type throttle bodies

£275.00

£330.00 inc. VAT

MADE TO ORDER

Built in approx 15 working days

Delivered in around 18 working days — about Fri 6 Nov if ordered today

Advanced Carbon Composite airbox Manufactured using Carbon IDT, (Carbon Infused Digital Technology), high-strength carbon composite, this airbox is super lightweight and exceptionally insulative. Made for Jenvey/DCOE throttle bodies with either M5 or M6


Standard DCOE throttle spacing 90mm cyl 1-2/3-4 and 96mm between cyl 3-4.

Configure · live pricing

Want this, but not quite like this?

A different size, a bore spacing we don’t list, a port shape to suit your head, a fitting somewhere else — we make these ourselves, so most of it is a drawing change rather than a new product. Tell us what you need and we’ll price it.

What’s included

In the base price

  1. One GMR airbox to suit DCOE-pattern bodies in your chosen size, on standard DCOE spacing
  2. Integrated full-radius velocity stacks — no separate stacks to buy or assemble
  3. Double-skinned carbon composite shell

Not in the base price

  1. Throttle bodies and intake manifold
  2. An air temperature sensor — the boss for one is an option above
  3. An idle valve — the 19mm idle output is an option above

Advanced Carbon Composite airbox

Manufactured using Carbon IDT, (Carbon Infused Digital Technology), high-strength carbon composite, this airbox is super lightweight and exceptionally insulative.

Airbox features

Integrated velocity stacks

  1. No fiddly assembly required, bolt the whole airbox with integrated full radius velocity stacks onto your throttle bodies or carburettors.

Double skinned

  1. The outer wall in all of our airboxes is double skinned which helps to insulate the inducted air from radiant heat.

No cutting or porting required

  1. Port spacing, velocity stack entry size and accessory ports are all customisable. If you don’t see the option you need, get in touch!

Motorsport Grade filtration

  1. All of our air boxes come with a replaceable high quality, twin layer, fully reticulated and polymer-impregnated foam designed for maximum dust filtration, high airflow, and long-term performance which also filters the idle/vacuum manifold.

Made to order.

Depth and stack length

The box is drawn to the depth you need — up to 120mm overall — with the integrated velocity stacks up to 90mm. Neither costs extra; they change what we draw, not what it costs.

The stacks live inside the box, so the stack length has to sit comfortably inside the overall depth. Tell us the space you have and the rev range you are after and we will tell you what fits; if a combination will not work we will come back to you before anything is made.

Why a universal box costs more

This box is drawn around your setup — your bore spacing, the depth you have room for, the stack length you want — so there is design work before anything is made. Our chassis-specific boxes are a single proven design we have already done that work for once, which is why they cost less. You are paying for the drawing, not for more carbon.