Honda S2000 - SF51 Taper ITB Kit

A Honda Individual Throttle Body (ITB) kit for the S2000 engine which contains an inlet manifold, four 51mm taper SF throttle bodies (45mm butterfly), fuel rail and four tapered airhorns. The ultimate race kit for the S2000. 

This engine was originally fitted into the Honda S2000 and severn rally / kit cars.

Standard Honda injectors will not fit. See recommended injectors in options.

Kit performance is enhanced by careful positioning of the EFI fuel injectors being located further upstream than standard and directly in the part throttle turbulence of the butterfly.  This allows increased time/distance for improved fuel mixing increasing torque and power where its needed.  Our spindles profiled to minimise cross sectional area at full throttle and an 8 degree shut angle (shallower than most) gives finer control at small throttle openings.  Our kits come built and balanced ready to fit you your engine and win races.

Jenvey Dynamics design, develop and manufacture all products in house often working with leading engine builders.  Uniquely, with our own foundry, all castings are created in the same factory that they are machined and built in.  Our cast systems are significantly lighter than fully CNC parts and all major components are backed up by rig tests of over 1 million cycles.  All our standard kits are proven but our throttle systems are extremely modular allowing bespoke throttle sizes and system lengths. Please order components individually for bespoke application.

This Jenvey kit requires an aftermarket ECU.

Drawing and other information can be found at the bottom of the page

Option and Accessories

Throttle operation can either be with a cable linkage kit or electronic throttle actuator.  (CLS2-SF/CLD2-SF ETA2-SF)   new part number ETA2-SF and ETA2-TB

An idle air system can help make road cars more useable but is not required with electronic actuation

We offer a range of injectors but recommend Siemens for this kit – see our injector sizing chart.

To fit a panel filter to this kit a carbon 50mm dished backplate is required. ABF-KIT-MH07

 For the 90mm airhorns the kit comes with we recommend a 90mm filter (if you have the space)