Below is graph:
1. Higher is SD with full Akra - custom mapped.
2. Green is mine with Akra EVO end cans and standard headers, baffles out - custom mapped.
3. Red below is mine, baffles in.
Same tuner, same dyno. Different bikes, a bit different intakes - so not 100% absolute truth - but you get an idea, free flow is important from 8000 rpm:
1. Higher is SD with full Akra - custom mapped.
2. Green is mine with Akra EVO end cans and standard headers, baffles out - custom mapped.
3. Red below is mine, baffles in.
Same tuner, same dyno. Different bikes, a bit different intakes - so not 100% absolute truth - but you get an idea, free flow is important from 8000 rpm: