I have a straight pipe from the header (stock) to my muffler (stock)...What am I gaining and losing? And how would that compare with me having a carsound or some other "high flow" cat?

 

Gain = noise, pollution, in car fumes.......
Loss = a little torque below say 3500 rpm.

Now if you decide to spray, run the test pipe! I picked up .35 in the 1/4 mile just buy using a $10 test pipe made from parts at Autozone.
14.05 to 13.70 on a SOHC

 

in car fumes?? explain please, i'm thinking of eliminating my cat and putting in a straight pipe myself...help thanks, lost of torque? gain of hp?

 

By removing the cat your polluting more emissions into our air. The gains are not worth it.

 

Less restriction, frees up HP, but in turn, polutes the world. Chances are you won't pass inspection w/out a cat.

 

can't i just put the cat back when i go take a smog test? and put the pipe in in the raceway?

 

hey you go a turbo for your car? how do i get a turbo for a 5th gen V6??

 

in a stock equipped cx the straight pipe only made power in your head due to the sound and like everyone else said is putting more **** in our environment!

 

with drivers window down about 1/3, the exhaust flows back in through the open window. With the cat on, you don't smell it.

Nothing like showing up for a date smelling like exhaust.

 

SloAccord, build it custom.

 

It's not worth it in an N/A car but it has some gains on a turbo application. You will pass inspection unless the guy inspecting it looks under your car. You will definitlely fail emissions though unless you put it back on.

 

**disclaimer** for offroad use only***

you can run a resonated straight pipe. It's basically a glass-pack in place of your cat. Running one will cut down on the loud ricey sound levels & at the same time free up exhaust flow restriction.

Some people say that running a str8 pipe is useless on a naturally aspirated engine (all motor), I beg to differ..

 

I just recently had to get a smog check so I went and got a bolt-on high flow cat...I dont know if people speak from experience when they say on n/a its useless but they are wrong...After I put the cat on..the car was not only slower...but also more sluggish..not as responsive...took it back off after the smog check...you can actually feel the diff in pull and responsiveness.