"I took my car to 5 SPEED and five days later I won the lottery! Coincidence? I think not"
(OK, we made this one up)

"Thanks to 5 SPEED for checking my car over and putting my mind at rest"
- owner, Staffordshire

Jenvey Throttle Bodies

throttle body kits

Why do I want it?

Remember when sports cars had twin Weber carbs? Remember when you could look down the long bonnet, mash the accelerator to the carpet and feel the car squat in instant response, hear the roar of those intakes converting petrol into power in an intoxicating bark as you were pitched down the road, rear wheels scrabbling for grip on the razor edge of acceleration?

Remember the delicious feeling of having your right foot connected directly to your rate of acceleration? Unfortunately you probably remember the poor fuel economy and the constant need to adjust the mixture and tune the carbs...

Well put away those rose tinted specs because instant response is back!

5 Speed and Jenvey Dynamics are proud to bring the responsiveness back in the form of a pair of twin throttle bodies designed exclusively for the Mazda MX-5.

Jenvey throttle bodies combine the instant response and power of a big carburettor with the reliability, accuracy and maintenance free nature of the very latest in vehicle electonics.

The Jenvey Dynamics throttle Body kits include:

  • A pair of throttle bodies (ITB's) 45mm diameter for the 1800, 42mm diameter for the 1600
  • A Jenvey Dynamics EFI inlet manifold
  • A fuel rail
  • Four 40mm long airhorns

Jenvey throttle bodies and all Jenvey throttle body accessories are engineered for Motorsport, offering excellent performance, reliability, lightness and value and are ideal for road, track or rally use.

What does it do?

Put simply, getting 5 SPEED to fit a throttle body kit will give you a significant increase in throttle response, induction sound ambience and of course, power!*

NA 1600 throttle body

Can I have one on my car?

Jenvey throttle body kits are available for the following engines:

  • Mazda MX-5 NA8 (Mk 1 1800): CKMZ02 TB45 Throttle body kit
  • Mazda MX-5 NB8 (Mk 2/2.5 1800): CKMZ01 TB45 Throttle body kit
  • Mazda MX-5 NA6/NB6 (Mk 1/2 1600): CKMZ04 TB42 Throttle body kit

What'll it cost Mister?

You're probably imagining that this kind of technology doesn't come cheap. Well relax, Jenvey kits retail through us at £611.00 plus VAT

Of course you'll need electronics to control the fuelling and ignition and we can offer a choice of solutions or allow you to add your preferred electronics to this superb kit.

Choose from the following options below: -

Omex ECU

A Plug and Play ECU developed by Omex specifically for the Jenvey MX-5 throttle body conversion. Fit and forget, this sophisticated computer will control your engine without you ever needing to so much as look at it after fitting.

Price £TBC

Adaptronic Select

A tuneable plug and play ecu that allows you to tailor your fuelling and ignition and just about any other parameter you can think of to your specific needs. For those who like to get involved.


More details about the kits can be found on the Jenvey website.

* Power figures by Jenvey Dynamics