[azynneo]

I was over with Bill @ Delicious tuning yesterday getting my car tuned after installing my innovate. He took my car out for a drive and said that he noticed back pressure due to my invidia q300 and the use of chevron gas causing him to remove about 10whp from the whole powerband(which i was really dissapointed). Now I thought back pressure was due to the sizing of the pipe (q300 = 60mm), but the people over at delicious are telling me to use a higher quality 2.5" like JDL, tomei, milltek etc and not a 3" pipe since higher velocity travel will cause low end torque to drop. Is the q300 that bad of a catback he stated that the design was terrible so I'd like some input here from some experts.