# Need 3" and 3.5" For Exhaust
**URL:** https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612
**Category:** NYSpeed Automotive
**Created:** [February 23, 2010, 5:30am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612 "2010-02-23T05:30:17Z")
**Posts on this page:** 20
**Page:** 1
### Author:  [@cougarspeed](https://forums.speedlife.net/u/cougarspeed)
#### Post date: [February 23, 2010, 5:30am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/1 "2010-02-23T05:30:17Z")
I remember a thread like this but search is pwning me. Basically I am going to make a 3" y-pipe and a 3.5" cat-back. I need to find some type of universal kit I can cut/paste. So someone point me in the right direction so I can get to work!
I am thinking of using this.
[http://www.flowmastermufflers.com/shop/index.php?main\_page=product\_info&cPath=1\_228&products\_id=4285](http://www.flowmastermufflers.com/shop/index.php?main_page=product_info&cPath=1_228&products_id=4285)
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### Author:  [@LZ1](https://forums.speedlife.net/u/LZ1)
#### Post date: [February 23, 2010, 5:37am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/2 "2010-02-23T05:37:15Z")
Purple hornies off the headers??
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### Author:  [@cougarspeed](https://forums.speedlife.net/u/cougarspeed)
#### Post date: [February 23, 2010, 5:39am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/3 "2010-02-23T05:39:16Z")
I have the og purple hornies still. Actually someone with an f-body building a race setup should take them. If anyone is interested they can have them in exchange for Kentucky Gregs.
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### Author:  [@95dime](https://forums.speedlife.net/u/95dime)
#### Post date: [February 23, 2010, 6:11am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/4 "2010-02-23T06:11:07Z")
dont wanna put down your project but 3.5" is overkill. for the motor you’re gonna have i would stick to 2.5" duals or a single 3". its easier to work with, easier to find, and will flow plenty.
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### Author:  [@cougarspeed](https://forums.speedlife.net/u/cougarspeed)
#### Post date: [February 23, 2010, 6:19am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/5 "2010-02-23T06:19:48Z")
> [@95dime](#):
>
> dont wanna put down your project but 3.5" is overkill. for the motor you’re gonna have i would stick to 2.5" duals or a single 3". its easier to work with, easier to find, and will flow plenty.
I am sure you are only trying to help but this car will probably make around 600RWHP on the bottle so I would like to not restrict the exhaust just because something is a little easier to find. Hell I was considering 4" and still might. Do it right ONCE is how my build go.
So can someone please just show me a good place to get the universal kits for 3" and 3.5" I would even consider 4".
Kthanx
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### Author:  [@turbociv](https://forums.speedlife.net/u/turbociv)
#### Post date: [February 23, 2010, 6:44am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/6 "2010-02-23T06:44:40Z")
try this place.
[http://www.mandrelbendingsolutions.com/servlet/StoreFront](http://www.mandrelbendingsolutions.com/servlet/StoreFront)
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### Author:  [@LZ1](https://forums.speedlife.net/u/LZ1)
#### Post date: [February 23, 2010, 6:45am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/7 "2010-02-23T06:45:27Z")
3.5 isn’t over kill for his setup…
His last setup ran dumps directly off the headers 🙂
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### Author:  [@turbociv](https://forums.speedlife.net/u/turbociv)
#### Post date: [February 23, 2010, 6:50am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/8 "2010-02-23T06:50:27Z")
i think cougerspeed should stop being such a fggt and just go 5 inch. :snky: gotta get ready for that turbo diesel sneakyness he has planned.
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### Author:  [@cougarspeed](https://forums.speedlife.net/u/cougarspeed)
#### Post date: [February 23, 2010, 6:53am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/9 "2010-02-23T06:53:47Z")
HAHA that link you gave me has builder kits that are exactly what I am looking for. However they only have 3" no 3.5" ☹ I need some of the 3.5" for the intake im building as well.
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### Author:  [@cougarspeed](https://forums.speedlife.net/u/cougarspeed)
#### Post date: [February 23, 2010, 6:57am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/10 "2010-02-23T06:57:21Z")
[http://www.mandrel-bends.com/catalog/builder-kits-33/ultimate-builder-kit-111/3-50-od-5-00-radius-16-gauge-aluminized-ultimate-bk-1089.html](http://www.mandrel-bends.com/catalog/builder-kits-33/ultimate-builder-kit-111/3-50-od-5-00-radius-16-gauge-aluminized-ultimate-bk-1089.html)
OH SNAP!
Although I think Newman will be very upset if I do not use stainless. ☹
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### Author:  [@newman](https://forums.speedlife.net/u/newman)
#### Post date: [February 23, 2010, 7:02am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/11 "2010-02-23T07:02:11Z")
aluminized is for fggts…
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### Author:  [@Freek](https://forums.speedlife.net/u/Freek)
#### Post date: [February 23, 2010, 7:03am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/12 "2010-02-23T07:03:28Z")
> [@cougarspeed](#):
>
> [http://www.mandrel-bends.com/catalog/builder-kits-33/ultimate-builder-kit-111/3-50-od-5-00-radius-16-gauge-aluminized-ultimate-bk-1089.html](http://www.mandrel-bends.com/catalog/builder-kits-33/ultimate-builder-kit-111/3-50-od-5-00-radius-16-gauge-aluminized-ultimate-bk-1089.html)
>
> OH SNAP!
>
> Although I think Newman will be very upset if I do not use stainless. ☹
Do it one with stainless and be done with it forever since I know you’ll be keeping the car for a long time. DO it right or do it twice.
or this … lol
> [@newman](#):
>
> aluminized is for fggts…
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### Author:  [@cougarspeed](https://forums.speedlife.net/u/cougarspeed)
#### Post date: [February 23, 2010, 7:04am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/13 "2010-02-23T07:04:34Z")
HAHAHA I am looking for basically the same thing in stainless right now.
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### Author:  [@Freek](https://forums.speedlife.net/u/Freek)
#### Post date: [February 23, 2010, 7:06am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/14 "2010-02-23T07:06:38Z")
[http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=350318694263&crlp=1\_263602\_263622&ff4=263602\_263622&viewitem=&guid=453b9a8a1240a041b89640a6fffd4721&rvr\_id=&ua=WVS%3F&itemid=350318694263](http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=350318694263&crlp=1_263602_263622&ff4=263602_263622&viewitem=&guid=453b9a8a1240a041b89640a6fffd4721&rvr_id=&ua=WVS%3F&itemid=350318694263)
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### Author:  [@Viper966](https://forums.speedlife.net/u/Viper966)
#### Post date: [February 23, 2010, 7:20am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/15 "2010-02-23T07:20:32Z")
I have a bunch of 3" Mild steel (not sure if aluminized or not) U bends that i would let go for CHEAP
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### Author:  [@ultradriver10000](https://forums.speedlife.net/u/ultradriver10000)
#### Post date: [February 23, 2010, 7:23am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/16 "2010-02-23T07:23:46Z")
These are some awesome sites… I might have to re-do the M3 exhaust as I currently hate it.
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### Author:  [@cougarspeed](https://forums.speedlife.net/u/cougarspeed)
#### Post date: [February 23, 2010, 7:41am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/17 "2010-02-23T07:41:01Z")
I am calling Columbia River to see if they can make me and Ultimate Builder Kit in 3.5" stainless as soon as they open.
Great site!
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### Author:  [@walter](https://forums.speedlife.net/u/walter)
#### Post date: [February 23, 2010, 7:53am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/18 "2010-02-23T07:53:24Z")
Damn thats huge.
Look at a diesel truck shop.
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### Author:  [@cougarspeed](https://forums.speedlife.net/u/cougarspeed)
#### Post date: [February 23, 2010, 7:55am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/19 "2010-02-23T07:55:49Z")
Not going to lie as soon as I explode the ls1 I am sure I will build some type of stupid 427 or something that is why I am going so big. I would do 3" true dual or even 2.5" but it is just a nightmare on this car.
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### Author:  [@ultradriver10000](https://forums.speedlife.net/u/ultradriver10000)
#### Post date: [February 23, 2010, 7:59am UTC](https://forums.speedlife.net/t/need-3-and-3-5-for-exhaust/79612/20 "2010-02-23T07:59:54Z")
> [@cougarspeed](#):
>
> Not going to lie as soon as I explode the ls1 I am sure I will build some type of stupid 427 or something that is why I am going so big. I would do 3" true dual or even 2.5" but it is just a nightmare on this car.
My 427 has true daul 3" 😛
Actually 1 7/8 primaries to 3" duals to quad 2.5".
I’m hoping to have the BMW go from dual 2.25" to a single 3" that sounds a little less ricie.
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