how much horse power will a cannon muffler from weapon-r and a cold air intake give my car? will it be significant or will it be insignificant any educated guess
jdmxsix said:cat. back all the way. just read on probetalk.com and see on here what people have and
actually, our stock exhuast systems are very non-restrive and a cat back or high preformance muffler( Hennessy or Magnaflow) will both only give you between 2-4 hp.