I currently have Fast Intentions HFCs on my G coupe. I am looking into made buying a used true dual CBE from Stillen. My only is concern is that the HFCs may make the exhaust RASPY. If I could hear peoples opinions about this I would appreciate it. Also what is the dif between Gen1 and Gen 2 and any other problems I may need to know about.

 

For sedan - Gen 2 is significantly quieter - Gen 1 gives slightly more HP...

I have Gen 1 w/Crawford hfc... the cats made it deeper but not louder or raspier.



I don't know if coupe even has gen1 & 2... if so, I have no idea about those (I'm not sure if you are coupe or sedan)