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Opel X20XE / C20XE 42mm single throttle valves

Opel Calibra
Opel Astra GSi
Individual throttle valves for direct mounting on the cylinder head

Fuel Rail Fittings:



Extension Length:

Ram Pipe Length:

Throttle Cable:


Drive By Wire:

€1,819.00 *

Prices incl. VAT plus shipping costs

Delivery time 30-40 Workdays

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Product information // Opel X20XE / C20XE 42mm single throttle valves

Single throttle valve complete kit - 1 piece

Usage: Opel Calibra, Opel Astra GSi with X20XE / C20XE engines

Material: milled aluminum

Color: silver, black, red, blue, orange anodized



Technical drawing


The single throttle kit is mounted directly on the cylinder head and does not require any further adapters or components. Ideal for high-end sports and racing engines, depending on the engine configuration, over 300PS are possible.

Scope of delivery:

- Intake bridge with AT-Power shaftless / butterfly throttle valve - 42mm oval.

- Suction tube length: 70mm, 100mm, 130mm.

- Funnel length: 40mm, 60mm.

- Throttle linkage for using the original throttle cable.

- Fuelrail: Dash 6, 8mm plug connection.

- Throttle valve position - left, right.

- Throttle position - left, right, center.



Throttle cable


Air filter


The original injectors and throttle cables can be used.

In addition, the inclusion of a throttle valve sensor (TPS) can be prepared and the appropriate sensor, air filter, fuel pressure regulator etc. can be supplied.


AT Power butterfly valves differ from most other butterfly valves on the market in a number of important ways. With AT-Power throttle valves, your engine will achieve the highest possible efficiency and thus performance.

Patented shaftless design means there is no need for a continuous medium wave. This reduces turbulence and flow losses. Only 0.5% less air flow compared to a throttle without any flap and up to 10% higher air flow compared to conventional throttle valves with a shaft.

Butterfly design = use of a flap that is as thin as possible, which is aerodynamically optimal and, in addition to the highest possible passage, also enables perfect metering of the flow rate (via throttle cable or electronic actuators).


Highest quality and accuracy of fit. Install, coordinate, win.