Prefabbed Downpipe - Performance Forum

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Prefabbed Downpipe
Sunday, February 23, 2014 2:26 PM
Does anyone sell a premade downpipe in 2.25" (header to cat) for ecotec cavaliers? It would be nice to have something that was mostly drop in, muffler shops around here won't touch aftermarket stuff from the calls I've made.




Re: Prefabbed Downpipe
Sunday, February 23, 2014 3:26 PM
MES (mandrel exhaust systems) makes downpipes for ecotec cavaliers. They bolt to the stock manifold and then to whatever cat-back (stock or otherwise). I have their 2.5" downpipe attached to an OEM LSJ exhaust manifold. Quality and fitment were pretty good.





Re: Prefabbed Downpipe
Sunday, February 23, 2014 5:22 PM
That is exactly what I'm looking for. Thanks man. The last of the things I need to bolt the charger on should be coming in soon.



Re: Prefabbed Downpipe
Sunday, February 23, 2014 6:27 PM
Get italian joe off css to port a lsj stock header.

Then get Mes to make you a 2.5" downpipe.
Re: Prefabbed Downpipe
Monday, February 24, 2014 4:04 AM
Already ordered from Mandrel!

For cat back I'm probably going to scavenge some CSS parts though.



Re: Prefabbed Downpipe
Monday, February 24, 2014 6:18 PM
If your going that route the factory lsj manifold is a 2.5 collector and stock l61 is slightly smaller than 2. stock l61 up top and Lsj on the bottom.






Re: Prefabbed Downpipe
Monday, February 24, 2014 7:27 PM
Annnnd ebay.....

Got one on the way, 50 shipped. Not to bad.



Re: Prefabbed Downpipe
Monday, February 24, 2014 7:55 PM
Haha






Re: Prefabbed Downpipe
Tuesday, February 25, 2014 7:16 AM
What is the benefit of a LSJ manifold over an aftermarket longtube header such as Pacesetter? Aiming for mid range power?


'03 LS Sport 5spd, Amsoil fluids, Vibrant cat-back, 5% 3M color stable tint, Z24 trunk lid

Re: Prefabbed Downpipe
Tuesday, February 25, 2014 7:51 AM
Probably a bit more mid and low range over the better high RPM performance of an actual header.





PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
Re: Prefabbed Downpipe
Tuesday, February 25, 2014 8:26 AM
And Cost. Cost is a good one.




Re: Prefabbed Downpipe
Tuesday, February 25, 2014 9:36 AM
I'd say mostly cost.



"In Oldskool we trust"
Re: Prefabbed Downpipe
Tuesday, February 25, 2014 10:04 AM
The sc guys say its a good alternative if ported to a shorty header. Which apparently gives decent gains.
Re: Prefabbed Downpipe
Tuesday, February 25, 2014 10:32 PM
Thanks for the info guys. Guess my N/A self will stick with the idea of a full longtube since I think my mid-range is satisfying for now.


'03 LS Sport 5spd, Amsoil fluids, Vibrant cat-back, 5% 3M color stable tint, Z24 trunk lid

Re: Prefabbed Downpipe
Wednesday, February 26, 2014 4:10 AM
On my daily driver I would rather have more low end and mid range anyway. Also, at 1/6 the cost I thought them attractive. Maybe I'll even spend some time with the grinder...




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