ATR catalytic convertor......

[S4Vince]

are they worth it?

I'm considering buying an ATR system and need to know whether or not to replace the (fairly new) cat with a free-flow ATR unit.

Thanks!

 

[Flyin Ryan]

Don't know if there worth it but keep in mind boost control if your still runing the stock system. You'll be overboosting if you don't keep the stock muffler or a stock cat over which means overboosting will be visiting your azz.