Jenvey Honda B18 C1 & C4 - SF48 Taper ITB Kit

The Jenvey Honda B18 C1 & C4 - SF48 Taper ITB Kit (CKHA02) replaces the standard intake with four 48mm tapered SF throttle bodies and 90mm air horns, creating an individual throttle body set-up aimed at track and race cars.

Designed and manufactured by Jenvey Dynamics in the UK, Jenvey's individual throttle body systems are prized for crisp throttle response, strong torque and the unmistakable induction sound. An aftermarket ECU is required.

Key Features:

• Built & Balanced: Supplied assembled and balanced by Jenvey, ready to fit.
• Improved Fuel Mixing: Injectors sit further upstream, in the part-throttle turbulence of the butterfly, for better atomisation, torque and power.
• Maximum Flow: Profiled spindles minimise cross-sectional area at full throttle.
• Fine Low-Speed Control: A shallow 8° shut angle gives finer control at small throttle openings.
• Proven Durability: Major components are rig tested to over 1 million cycles.
• UK Made: Cast in Jenvey's own foundry and machined in the same UK factory; castings are lighter than fully CNC-machined parts.
• Modular System: Bespoke throttle sizes and system lengths can be built to order.
• Build It Your Way: Choose your throttle actuation and throttle position sensor above. The price updates as you choose.

Features

• 48mm tapered SF throttle bodies with 45mm butterflies
• 90mm long air horns included

Technical Specifications:

What's In The Box?

• 1 x Inlet manifold
• 4 x 48mm tapered SF throttle bodies (45mm butterfly)
• 1 x Fuel rail
• 1 x Set of 90mm long air horns
• Plus any throttle actuation and throttle position sensor options you select above

Complete Your Kit:

These Jenvey parts are sold separately and can be added to your basket from the links below.

• TPS2 loom socket for TP1/TP8/TP11 sensors (£14.40)
• TPS3 DTM loom socket for the Contactless sensor (£21.60)
• 3.0 bar fuel pressure regulator (£110.40, fits the housing below)
• Remote regulator housing with -6 JIC fittings (£74.40)
• Idle control valve (£106.80, for ECU idle control on road cars)
• Synchrometer 39-55mm (£79.20)

FURTHER OPTIONS AVAILABLE ON REQUEST:

(Please contact us to add any of the following)

• Ti Automotive Fuel Pump (+£159.60 inc VAT)
• Filter kit: 90mm filter with 50mm carbon backplate (+£393.60 inc VAT)

Please note:

• Siemens 440cc short Minitimer injectors are recommended for this kit and are available on request.
• A panel filter requires a 50mm dished carbon backplate (ABF-KIT-MH03); where space allows, a 90mm filter suits the air horns.
• An idle air system improves road drivability but is not needed with electronic throttle actuation.

Frequently Asked Questions (FAQs):

Q: What does this kit fit?
A: Honda B18C1 and B18C4 engines, such as those fitted to the Honda Civic. Please contact us if you'd like us to confirm fitment for your engine.

Q: Do I need an aftermarket ECU?
A: Yes. Individual throttle bodies need an aftermarket ECU that is mapped to suit the kit.

Q: Which throttle actuation should I choose?
A: Most customers choose a cable linkage: single for one throttle cable, double for a twin-cable setup. The electronic actuator is for drive-by-wire systems with a suitable ECU.

Q: Which throttle position sensor should I choose?
A: The Colvern CP17 is the standard sensor. The Contactless L&R sensor has no wearing parts, so it's ideal for motorsport. Remember to add the matching loom socket.

Q: Are injectors and a fuel pump included?
A: No, unless listed in What's In The Box. Add them from the Complete Your Kit list above.

Q: Do I need an idle control valve?
A: It's recommended for road cars to improve drivability, but it isn't needed with electronic throttle actuation.

Q: Is this kit made to order?
A: Yes. Jenvey builds kits to order, so please allow time for manufacture. Please contact us for current lead times.

Q: Can I get a different bore size or specification?
A: Yes. Jenvey systems are modular and bespoke builds are possible. Please contact us and we'll confirm fitment and price.