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Top > Cayenne > > CIS airbox overpressure pop-off valve, 911 2.7 L (74-77) + 911 3.0 L (76-83)

CIS airbox overpressure pop-off valve, 911 2.7 L (74-77) + 911 3.0 L (76-83)
CIS airbox overpressure pop-off valve, 911 2.7 L (74-77) + 911 3.0 L (76-83)
911.020082SP
Qty 
Available 48.00 € TTC
40.00 € HT
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Our overpressure pop-off valve for vehicles equipped with a CIS airbox is used on the following vehicle models with a K-Jetronic fuel injection system:

    Porsche 911 2.7 L 110 KW / 150 HP. (1974-1975)
    Porsche 911 2.7 L 110 KW / 150 HP. (JPN) (1976)
    Porsche 911 2.7 L 121 KW / 165 HP. (1976-1977)
   
    Porsche 911 S 2.7 L 129 KW / 175 HP. (1974-1975)
    Porsche 911 S 2.7 L 121 KW / 165 HP. (USA/CAN/CAL/JPN) (1976-1977)

    Porsche 911 2.7 L Carrera 129 KW / 175 HP. (USA-CAN) (1974)

    Porsche 911 S Carrera 2.7 L 121 KW / 165 HP.  (USA-CAN) (1975)*     
    Porsche 911 S Carrera 2.7 L 118 KW / 160 HP. (California) (1975)*

* Models equipped with heat exchangers and thermal exhaust reactors

    Porsche 911 Carrera 3.0 L 147 KW / 200 HP. (1976-1977)

    Porsche 911 SC 3.0 L 132 KW / 179 HP. (1978-1979)
    Porsche 911 SC 3.0 L 138 KW / 188 HP. (1980)
    Porsche 911 SC 3.0 L 150 KW / 204 HP. (1981-1983)

    Porsche 911 SC 3.0 L 132 KW / 179 HP. (USA/CAN/JPN) (1978-1979)
    Porsche 911 SC 3.0 L 132 KW / 179 HP. (USA/CAN/JPN) (1980-1983)

Our over pressure pop valve for the CIS air box for Porsche 911’s is a must-have accessory for K-Jetronic vehicles equipped with plastic air boxes.

Porsche 911 engines in the vehicles above have had the bad habit of backfiring and blowing a hole in the air box. The 911 over pressure valve is installed inside the air box and when a backfire occurs the valve will instantly open and release this backfire pressure. The over pressure valve then automatically closes and the engine continues to run.

This pressure valve conforms to all emission regulations and has no effect on engine performance or gas mileage!

-Prevents costly air box explosions!
-Installed with the engine and air box in place.
-Materials and instructions for installation are included.

The installation of the overpressure pop-off valve is recommended for CIS air boxes reference 911.020080 and 911.020081.

Quantity required per vehicle: 1
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