# Is the Magnaflow cat bidirectional? \*PIC\* **URL:** \ **Category:** SON240sx Automotive\ **Created:** [October 15, 2005, 8:02pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472 "2005-10-15T20:02:55Z")\ **Posts on this page:** 19\ **Page:** 1
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [October 15, 2005, 8:02pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/1 "2005-10-15T20:02:55Z")
Is the Magnaflow 3" catalyctic converter bi-directional? Like does it matter which direction you put it? I didn’t see any flow direction arrow on the thing but there is a very small arrow of some sor (but I can’t tell if its just somethin or for flow direction) I got one end welded already and just realized after…(save the ignorant comments) Let me know ---
**Author:** ![TheDecline](https://avatars.discourse-cdn.com/v4/letter/t/f1d935/32.png) [@TheDecline](https://forums.speedlife.net/u/TheDecline)\ **Post date:** [October 15, 2005, 9:19pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/2 "2005-10-15T21:19:05Z")
im pretty sure there is a flow arrow on it if i remember mine correctly. ill take a look at mine tomorrow to make sure but it shouldn’t matter at all which way its going. i didn’t pay any attention when i put mine in and haven’t had any problems. ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [October 15, 2005, 11:11pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/3 "2005-10-15T23:11:52Z")
Here’s a pic of the cat (no comments on welding). :squint: The end that you see at the top of the image is where the flange would mate up with the turbo downpipe. ![http://www.son240sx.ca/images/gonad/srcat.jpg](http://www.son240sx.ca/images/gonad/srcat.jpg) ---
**Author:** ![Samco](https://avatars.discourse-cdn.com/v4/letter/s/e0b2c6/32.png) [@Samco](https://forums.speedlife.net/u/Samco)\ **Post date:** [October 16, 2005, 4:22pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/4 "2005-10-16T16:22:54Z")
not that its bad or anything but if you have a mig there I’d be happy to give you a hand. 🙂 ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [October 16, 2005, 6:03pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/5 "2005-10-16T18:03:46Z")
> [@Samco](#): > > not that its bad or anything but if you have a mig there I’d be happy to give you a hand. 🙂 I didn’t weld it; I had someone weld it. And as long as it’s sealed and not leaking, I could care less how it looks. Anywho, guess I’ll have to reverse the cat jsut to avoid regrets down the road. ☹ ---
**Author:** ![Happy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/happy240sx/32/5515_2.png) [@Happy240sx](https://forums.speedlife.net/u/Happy240sx)\ **Post date:** [October 16, 2005, 6:07pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/6 "2005-10-16T18:07:15Z")
hahah – you do the fancy blow up window but you don’t crop out hte weld…Gonad you kill me man. ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [October 16, 2005, 6:09pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/7 "2005-10-16T18:09:35Z")
> [@Happy240sx](#): > > hahah – you do the fancy blow up window but you don’t crop out hte weld…Gonad you kill me man. It’s not that bad. :dunno: ---
**Author:** ![Happy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/happy240sx/32/5515_2.png) [@Happy240sx](https://forums.speedlife.net/u/Happy240sx)\ **Post date:** [October 16, 2005, 6:49pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/8 "2005-10-16T18:49:32Z")
> [@Gonad](#): > > [quote=Happy240sx]hahah – you do the fancy blow up window but you don’t crop out hte weld…Gonad you kill me man. It’s not that bad. :dunno:[/quote] No it’s not…but you pointed it out…I’m sure other won’t of even noticed had you not said anything… ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [October 16, 2005, 6:52pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/9 "2005-10-16T18:52:59Z")
> [@Happy240sx](#): > > [quote=Gonad][quote=Happy240sx]hahah – you do the fancy blow up window but you don’t crop out hte weld…Gonad you kill me man. It’s not that bad. :dunno:[/quote] No it’s not…but you pointed it out…I’m sure other won’t of even noticed had you not said anything…[/quote] Oh trust me, people will. ---
**Author:** ![\_M\_aurice](https://avatars.discourse-cdn.com/v4/letter/_/c5a1d2/32.png) [@\_M\_aurice](https://forums.speedlife.net/u/_M_aurice)\ **Post date:** [October 17, 2005, 7:02pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/10 "2005-10-17T19:02:55Z")
Who cares which way the bloody thing flows… Just punch it out 😉 ---
**Author:** ![Vassago](https://avatars.discourse-cdn.com/v4/letter/v/ac8455/32.png) [@Vassago](https://forums.speedlife.net/u/Vassago)\ **Post date:** [October 19, 2005, 8:13pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/11 "2005-10-19T20:13:41Z")
> Who cares which way the bloody thing flows… Just punch it out haha, nice way to spend $100 on a hight flow cat[/quote] ---
**Author:** ![\_M\_aurice](https://avatars.discourse-cdn.com/v4/letter/_/c5a1d2/32.png) [@\_M\_aurice](https://forums.speedlife.net/u/_M_aurice)\ **Post date:** [October 20, 2005, 2:51pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/12 "2005-10-20T14:51:15Z")
Same as a test pipe, only not as purdy. ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\ **Post date:** [October 20, 2005, 3:30pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/13 "2005-10-20T15:30:48Z")
Good for you Gonad for keeping a cat in your car. I did the same when I put my exhaust on. It will keep the noise down and your also being responsible. ---
**Author:** ![Cal](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/cal/32/5505_2.png) [@Cal](https://forums.speedlife.net/u/Cal)\ **Post date:** [October 20, 2005, 4:07pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/14 "2005-10-20T16:07:45Z")
It doesnt matter which way you put it on, just slap 'er on there. ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [October 20, 2005, 4:08pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/15 "2005-10-20T16:08:15Z")
> [@S14\_240sx](#): > > Good for you Gonad for keeping a cat in your car. I did the same when I put my exhaust on. It will keep the noise down and your also being responsible. What can I say, I love the Earth. :dunno: ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\ **Post date:** [October 20, 2005, 7:24pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/16 "2005-10-20T19:24:24Z")
ya the earth is preaty cool and stuff ---
**Author:** ![DTS](https://avatars.discourse-cdn.com/v4/letter/d/8491ac/32.png) [@DTS](https://forums.speedlife.net/u/DTS)\ **Post date:** [October 20, 2005, 7:28pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/17 "2005-10-20T19:28:43Z")
> [@\_/\_/\_/M aurice](#): > > Same as a test pipe, only not as purdy. actually a punched cat has been proven to make less HP than a test pipe or a highflow cat. the broken material the exhaust gas going from a small chamber to big to small fucks up the flow. and you will still get caught with a punched cat since cops carry heat guns now… ---
**Author:** ![Cal](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/cal/32/5505_2.png) [@Cal](https://forums.speedlife.net/u/Cal)\ **Post date:** [October 20, 2005, 8:16pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/18 "2005-10-20T20:16:47Z")
> [@DTS](#): > > [quote=_/_/\_/M aurice]Same as a test pipe, only not as purdy. actually a punched cat has been proven to make less HP than a test pipe or a highflow cat. the broken material the exhaust gas going from a small chamber to big to small fucks up the flow. and you will still get caught with a punched cat since cops carry heat guns now…[/quote] all they have to do is tap it with a stick and they can tell that it’s hollow. ---
**Author:** ![\_M\_aurice](https://avatars.discourse-cdn.com/v4/letter/_/c5a1d2/32.png) [@\_M\_aurice](https://forums.speedlife.net/u/_M_aurice)\ **Post date:** [October 21, 2005, 3:06pm UTC](https://forums.speedlife.net/t/is-the-magnaflow-cat-bidirectional-pic/89472/19 "2005-10-21T15:06:45Z")
Well then… godamn. oh well.