Whats the diff btw HiFlow Cat and Test pipe??
i have 99CivicEx, and my oem cat was broken internal, i didn't have budget to buy the oem cat right now...so i went to the local race shop...and ask the guy to install the cat converter...he show it to me ...and he install it for me...my car ran great but it is so loud
and i wonder if the guy put the hiflow cat or test pipe in my car...how can i tell the diff??? and whats the diff btw those? thanks

 

A high flow cat will still have some kind of woven material in it and serve the purpose of a cat, a test pipe is just a straight piece of pipe with flanges on both sides, or a "cat-delete".

 

hi flow cat- theres a chance to pass emissions, but i heard stories where some couldnt with it on.
test pipe- you have no chance at passing emissions.

 

oh i see...thanks
i have hight flow cat installed on my car...but it doesn't sound very good...i got obx exhaust....do u think by install header my car will sound better?

 

i lived in FL..and there is no emissions here...so im good

 

and right now i got check engine light
it showing the code P0420 Catalyst effiency below thrshole (bank1)...anyone know whats causing this? and does it gonna effect anything?


Modified by thaiboiz at 2:40 PM 4/2/2008

 

Get a cat and save us from emissions, it only robs you of like 2hp. I don't want deadly gasses flowing around.

 

A highflow cat, by some luck, may get your thru inspection. A test pipe will land you a $500 ticket (depending on state laws)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thaiboiz &raquo;</TD></TR><TR><TD CLASS="quote">Whats the diff btw HiFlow Cat and Test pipe??
i have 99CivicEx, and my oem cat was broken internal, i didn't have budget to buy the oem cat right now...so i went to the local race shop...and ask the guy to install the cat converter...he show it to me ...and he install it for me...my car ran great but it is so loud
and i wonder if the guy put the hiflow cat or test pipe in my car...how can i tell the diff??? and whats the diff btw those? thanks</TD></TR></TABLE>

Well if you comparing an ebay high flow cat to a test pipe then there is no difference. If you get a real high flow cat then yes it still does its job just not as well.

 

You can usually tell a test pipe from a hi-flow. Most cheap test pipes are just a regular exhaust pipe with two flanges on the end. Hi-flow has a hump in between the two flanges with flat top and bottom. Most of those chrome ones on Ebay claims to be high-flow, but they're just test pipes (no mesh inside). Carsound Magnaflow sells the real high-flow cats.

Hi-flows (carsound)
http://cgi.ebay.com/ebaymotors...ZWDVW

Test pipes (the description says straight thru) = Test Pipes
http://cgi.ebay.com/ebaymotors...ZWDVW
http://cgi.ebay.com/ebaymotors...ZWDVW

The most obvious Test-pipes
http://cgi.ebay.com/ebaymotors...ZWDVW
http://cgi.ebay.com/ebaymotors...ZWDVW

You said your cat was [freak]ed, so just bust out all the inside material with a metal rod, and waa-laaah, you got yourself a test-pipe! then take those materials to a scrap yard and receive $80-$100 for the platinum.

 

This is a test pipe. Loud and does nothing for emmissions:


A high flow cat is jsut like the stock cat but has wider inlets and outlets. It also has this stuff inside which reduces emmissions:




It shouldn't be out of the cat but if you own a piece of crap Carsound, it'll blow out of the tailpipe on its own



And ebay will have their "racing cat" which is just a resonated test pipe. They have punched pipe inside that works like a fart can style muffler and does nothing for emmissions.

 

thanks everyone..!!!
now i know the diff
i just got resonated test pipe