Darren M Posted August 31, 2018 Share Posted August 31, 2018 Hi All. Just done double decat on my NA and I’m very happy with the sound but since doing it the exhaust fumes seem to smell very fumey like unburnt fuel. There is no visible smoke it’s just the smell is different. Is this normal after a decat ? Did the cats filter out the smells ? Any thoughts. Thanks Link to comment Share on other sites More sharing options...
Style Posted August 31, 2018 Share Posted August 31, 2018 Yep, it'll smell a lot more with no cats in the system. If I start my car in the garage or reverse in, the place is stinking in seconds Link to comment Share on other sites More sharing options...
Darren M Posted August 31, 2018 Author Share Posted August 31, 2018 Ok. I Googled it but there was nothing Supra specific just something on a Renault forum saying decatted na’s always smell. Link to comment Share on other sites More sharing options...
Mike2JZ Posted August 31, 2018 Share Posted August 31, 2018 Straight pipe cars in general will smell of fuel. Link to comment Share on other sites More sharing options...
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