Sorry for my bastardo english. I'm in-hurry to do something and
didn't pay attention to the subject.

Ok....let me correct my question:
I have a very short exhaust system, no more than 5 feet from the exhaust port to the tip of the muffler. I don't have catalytic. I heard everyone using between 2.5 to 2.75 piping. I like to use 3" all the way. What can I expect from this modification?
I'm using a sidepipe sent by flomaster. The sidepipe is designed for cobra and seven cars. The round sidepipe still under research and sent to me with no charge in exchange for my feedback or information (power-noise) after install. The Hushpower II has inlet of 3" and outlet 3".


Thanks

 

I don't know about your exhaust question, but you might fail English class typing sentences like that.

 

Why would you want to do that?

 

Are you turbo?

 

From my personal experience, it will feel like you're reving more and not really going anywhere at lower rpm but power up top feels stronger. Gas mileage suffers too at city driving since you will constantly reving up just to move at decent speed.

 

Guys. He has an F20c in a Lotus 7. He neglects to mention that sometimes but base your answers on that.

Probably wants performance and no economy

 

Even stilll if he wants performance and he isnt boosted he should go with 70mm IMO

 

3'' all the way, i've been 2.5 and its full of failsos.

 

Correct me if I can't use a ruler correctly but isn't 70mm roughly 3 inches?

 

70MM = ~2.75 inches.