[RocktimusPryme]

Originally Posted by ponjohn

Supposedly not because the exhaust gases are cooling.

Thats kinda where I was too, a lot of supposedlies. What gets me though is we can for sure show that mufflers can kill power...... but maybe thats because chambered mufflers actually block flow rather than just reducing diameter.

Before Engine Masters went under I made a facebook request for ideas that they test both that, and to like a 4 foot straight three inch pipe, one with some mandrel bends in it, and one with the same bends but crush bent to see how that affected power.