My friend and I just installed my cusco downpipe and Fujitsubo exhaust last night. When i give the car gas the turbo gets really loud. NOw i know its spooling faster and has more room to breath aso its going to get louder but its really loud. I just wanted to know if this is normal or if i have a leak somewhere. I dont think so but any feed back would be nice.

 

yeah its normal, anytime you remove cats your car gets louder .... plus I don't know how loud your catback is .... some are louder than other .... from what I have read / heard Borla hush is the quietest

 

cats dampen sound. (so do turbos)

jason