I have a 2010 S4 with an intake but want more power. What's the most reliable company to go with for a stage 1 tune that won't burn the cats out prematurely?
I bought the S4 with a bad driver side cat and it cost me $1600 to replace since I had to go OEM and I live in CA. I dont want to have to go through that again with a stage 1 tune. Will I be able to pass CA smog with stage 1?
I've done my research and APR tunes supposedly have high EGT temps and Revo tunes blew engines from their tune. Spoke to a couple local shop tuners and they said Revo is good for a stock s4. With so many companies to choose from what tune did you guys go with and why and have you had any problems with it?
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