[boxercup]

Originally Posted by roger albert

Well, of course that's what they say.

Look, if you add an exhaust that flows more, then you will need to add fuel to match: Period.

All the marketing in the world can't counter chemistry, physics, and common sense. (well, maybe the latter)

Greetings Roger,

You are right! Marketing 101.

Especially with a BMC or Pipercross filter. (Which are the only filters I reccommend>higher flow and they do a great job filtering the air)

If you reduce the pumping losses on the intake and exhaust sides you have reingineered the power process. The engine now has different needs.

The engine is an air pump!

More air in-More air out = the need for re-tuning the ECU's timing and injection parameters if you want to reap the benefits of your mods.