Prevent costly air box explosions! Porsche 911 engines from 1973 on have had the bad habit of backfiring upon cold-starting. And blowing a hole in the air box. When this pop valve is installed in the air box and a backfire occurs, the valve will instantly open and release the backfire pressure. Afterwards, the pop valve then automatically closes and the engine continues to run. The air box pop valve conforms to all emission regulations and has no effect on performance or gas mileage.
This item may need to be sourced from Germany and would take 2-4 weeks to arrive. Once ordered it cannot be canceled. Please call to check stock or request expedited shipping.
Lower valve cover gaskets can degrade fairly quickly and become a root cause of engine oil drips and leaking. We recommend checking them frequently and installing new gaskets with every valve timing service. Sold individually. 2 necessary per vehicle. Left or right side fitment
This item may need to be sourced from Germany and would take 2-4 weeks to arrive. Once ordered it cannot be canceled. Please call to check stock or request expedited shipping.