gut my dp? - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Engine Mods Talk about Chevy Cobalt Engine Modifications here.

LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 06-05-2009, 04:32 PM Thread Starter

BryceL61's Avatar
Join Date: Oct 2008
Location: Abbotsford BC, Canada
Posts: 254
Send a message via Skype™ to BryceL61
gut my dp?

So I was wondering if I would see any improvements if I just gut my stock downpipe to make it catless myself? as I am going turbo later on and dont want to waste money on a expensive downpipe. Could I just drill my cat out or would It be better to cut that section of pipe and weld another pipe the same size as stock in its place?

Has anyone done this can it be a cheap mod thats worth giving a try?
BryceL61 is offline  
Sponsored Links
post #2 of 3 (permalink) Old 06-05-2009, 04:42 PM
Staff AlumniDedicated

OBZ's Avatar
Join Date: May 2006
Location: S.L.C. UT.
Posts: 3,006
Gutting the DP will do nothing but make it sound like crap. I read an article a while ago about some people actually putting it to the test on a dyno. Because the cat is the shape it is, it causes every bit as much restriction as the cat because the flow is not smooth. Replacing the cat with a straight pipe will help out a little, but still not much.. Especially with how tiny the 2.2 downpipes are.

Here is a link to a few pics comparing the 2.2 DP vs the LSJ DP
If you are looking for a cheap solution, the LSJ DP is the way to go. Or you could buy a catless DP from racing solution when the release them in the next couple weeks.

But still, At end of the day, catless is going to sound like SH!T

"A wise man speaks because he has something to say,
A fool speaks because he has to say something"
OBZ's showoff thread!
OBZ is offline  
post #3 of 3 (permalink) Old 06-05-2009, 04:51 PM

that07balt's Avatar
Join Date: Jun 2009
Location: navarre florida
Posts: 802
what he said i have a catless down pipe on my 2.2 and as far as top end there's a lil more power there but the bottom end isnt so great

ballin outta control in a camo balt
that07balt is offline  
Sponsored Links
Closed Thread

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome