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Showing results for tags 'exhaust upgrade'.
Hi all, This will be my first post, thanks for a great forum ! I've recently purchased a exhaust system from Design911 in the UK which has the valvetronic function on. This is said to replicate the PSE which my car does not have factory installed. Wired it up and put the vacuum hoses, tested the system and it works fine. Over to the issue for my car: When starting up the car, the neutral positon of the valves is open, which means a lot of noice from the exhaust. When switching this by the solenoid, sending vacuum into the system and the valves closes. This means less soun
Will installing 200 cell cats on 997.1 cause a CEL? If so, is there anything that can be done to eliminate it? Also curious whether their use on car with PSE will significantly increase exhaust loudness as I'm not really looking for more sound. Appreciate any feedback including performance experience when combined with competition throttle body and intake plenum. Thank you.