WebJul 23, 2024 · High flow cats will not set off the check engine light, at least according to standard engine diagnostics. Bottom line. A high-flow catalytic converter is an excellent … WebRegarding high flow cats: Both CARB and the EPA do not allow the replacement of a catalytic converter with a non-exempt "high flow" performance replacement unit. In fact, it is technically not legal to even replace a catalytic converter unless it has been proven by a technician to have failed, and then it can only be replaced with an exempt OEM ...
High Flow Catalytic Converters: How They Increase Engine …
WebJul 30, 2008 · I’m sure the same rules apply to high flow cats. This is a known effect of freer flowing exhausts. They make more HP up high, but you lose torque down low. You must make some sort of compromise between the two, and in my opinion, Porsche did an excellent job. I wouldn’t tell anyone not to get an aftermarket exhaust or cats because of … WebJul 20, 2024 · High-flow cats sound more powerful and decently more loud than stock. In terms of how loud you can expect to hear, it will depend on the mufflers. There are no … take it back chords
How Catalytic Converters Work - Speed Academy
WebThe higher flowing the cat is, the higher the sound level will be. Typically the difference in sound level before and after a high flow cat can be from 2~4 dB for a hi-flow 100 or 200 … WebJun 28, 2008 · South East Pennsylvania. Jun 26, 2008. #2. Hi flow cats sound much better and decently louder than stock and as far as how loud I guess would depend on your … WebMay 23, 2014 · For on road use, the highest flowing legal cat is a 200 cell. As to the size question, basically, the larger the body, the deeper the sound. So a 5" body cat will produce a deeper note than a 4" body cat. I am no longer in business but I … take it away sandwiches charlottesville