TB1 Jenvey Throttle Body Kit for Mazda MX-5 NA NB
We have taken the legendary Jenvey throttle body kit and refined it to work even better on the MX-5 platform. Firstly, we have included the beautifully engineered SPS Motorsport Idle Air Control Valve to ensure OEM idle quality can be achieved with appropriate tuning. The idle air control valve has an integrated vacuum manifold which allows vacuum-assisted brakes to be retained, making driving a pleasure.
Then, we have specified an under throttle body linkage kit, instead of the usual over body kit. Not only does moving the linkage under the throttle bodies clean up the look in the engine bay, but it also prevents the throttle cable from fouling the valve cover or touching the timing belt on cut covers. We install the linkage facing towards the front of the car to give the largest radius for the throttle cable to run around, which keeps the pedal feeling snappy and light.
Brand new Bosch 330cc injectors are fed via a two-piece billet aluminium fuel rail for all kits. Our own fuel pressure regulator adapter kit allows the standard fuel pressure regulator or damper to be installed, retaining the OEM fuel system. Where 1.8s have the injectors in the head, we supply 4 stainless steel core plugs to seal the unused ports.
Previously, installing the filter was extremely difficult. The air filter has been swapped from a sausage style to a pair of Ramair twin socks to greatly improve fitment around the clutch master cylinder on RHD cars. The air filters have been specified to leave ample space above the end of the 50mm long air horn and leave enough clearance to the proportioning valve on NB 1.8s. Our air horns are also slightly narrower at the end of the bell mouth to prevent them from clashing between cylinders 2 and 3 on 1.6s.
We’ve even gone to the lengths of sourcing a replacement throttle cable with a ball end to ensure that fitment is just like OEM. The cable usually supplied by Jenvey is a typical barrel type, and not compatible with a standard pedal. On top of that, we’ve pre-tapped the manifold to G 1/8 to accept the idle air control valve fittings. We wanted to guarantee that this Jenvey setup is the best, most complete individual throttle body kit on the market, bar none.
Kit Contains
- 4 x Jenvey throttle bodies
- 4 x 50mm long air horns
- Cast intake manifold with G 1/8 threads pre-tapped for idle air control ports
- Two-piece billet aluminium fuel rail
- Bosch 330cc EV14 injectors
- Fuel pressure regulator adapter kit
- 8mm fuel hose 1 metre
- TPS sensor & plug
- Under throttle body linkage kit
- Ramair twin air filters
- SPS Motorsport Idle Air Control Valve
- IAT sensor harness (Except 1.8 VVT)
- 4 x Injector bungs (1.8 only)
- Standalone ECU
*Trumpets shown in the engine bay photo differ from included air horns