I'm debating whether I should go with an Armytrix downpipe with a 200 cell high flow sports cat or Amrytrix without a cat. At that time I'll have a Renntech tune, upgraded air filters and BOVs. Would there be that much of a difference in hp? The reason for the sports cat is to keep the decibels down during long cruises but if it sacrifices more than 10 or so hp...

Thanks,

CJ

 

If you care about 10 extra horsepower, go with catless for sure and just close your exhaust valves when cruising...