"Real" Catback vs fabricated catback - Club4G Forum : Mitsubishi Eclipse 4G Forums - 2006-2012 Eclipse Authority

stangcobra · July 18th, 2011, 11:39 AM

Hey guys, I was wondering what the difference would be between buying a catback like the magnaflow one from rre, versus having an exhaust shop make up some new piping and use the axleback I have on there now. Would I see dramatically higher power gains by buying something like a magnaflow one or would it not really matter which route I went

FeaRlezZ · July 18th, 2011, 11:44 AM

if the diameter of the pipe is the same 2.5in it should not make a difference. . the resonator on the magnaflow is not restrctive . . the only difference u will get mainly is sound

stangcobra · July 18th, 2011, 11:45 AM

Any idea what the diameter of the pipe on the magnaflow is? I'm trying to decide whether 2.5" or 3" would be better for me

akley88 · July 18th, 2011, 11:45 AM

if your not fi then 2.5 is good

stangcobra · July 18th, 2011, 11:48 AM

what if I'm gonna run nitrous, 2.5 still good?

akley88 · July 18th, 2011, 11:49 AM

yeah thats what i have

Steveo · July 18th, 2011, 11:51 AM

U don't need any more than 2.5. Only difference with a custom exhaust is usually sound and they can be cheaper in cost sometimes. I have a straight pipe done on mine because I Dont want stock piping after my headers

FeaRlezZ · July 18th, 2011, 11:52 AM

anyone straight pipe a gs with headers ? just want to know how it sounds . .

akley88 · July 18th, 2011, 11:53 AM

Quote:

Originally Posted by FeaRlezZ

anyone straight pipe a gs with headers ? just want to know how it sounds . .

loud

muscles · July 18th, 2011, 11:53 AM

Quote:

Originally Posted by FeaRlezZ

anyone straight pipe a gs with headers ? just want to know how it sounds . .

it sounds good. Loud but good.

snakeeyes · July 18th, 2011, 11:55 AM

the difference in a custom vs aftermarket is the mandrel bend.

akley88 · July 18th, 2011, 11:57 AM

heres how mine sounded. audio isnt the greatest.
VID00004-20110430-1328.mp4 video by oakleyfreak88 - Photobucket

muscles · July 18th, 2011, 12:07 PM

yo akley did you have a aftermarket muffler on that clip or just stock?

740 Turbo Brick · July 18th, 2011, 03:10 PM

Quote:

Originally Posted by FeaRlezZ

anyone straight pipe a gs with headers ? just want to know how it sounds . .

Raspy. And loud.

akley88 · July 18th, 2011, 03:13 PM

Quote:

Originally Posted by muscles

yo akley did you have a aftermarket muffler on that clip or just stock?

no muffler thats the flange you can see

muscles · July 27th, 2011, 09:14 AM

Aww gotcha. I have the apexi n1 on the end of my straight pipe with the silencer. Pretty good combo noise wise.

akley88 · July 27th, 2011, 10:19 AM

i might switch back to the aero muffler again just because it can be so much fun being loud

muscles · July 27th, 2011, 10:36 AM

Ha it has it perks. Like scaring girls holding up car wash signs.

akley88 · July 27th, 2011, 10:38 AM

yeah the only drawback is highway cruising is loud

muscles · July 27th, 2011, 10:49 AM

Yea when I had a cheap autozone muffler on that shit gave me a killer headache.

trevroar · July 27th, 2011, 11:01 AM

If you're planning on upgrading your headers, or eliminating catalytic converters then buying a catback system is a waste of money as they were intended to be used with stock exhaust from the cat forward.

NitroGlisson · July 27th, 2011, 12:42 PM

Some of the cat-backs out there aren't as advertised. The Aeon Imports cat-back for example was really a header back since it eliminated the rear cat. I guess they considered it a cat back since it left the pre-cats but I would have to disagree with their definition. I have a 3" exhaust on mine.....lost a little low-end torque but since I'm planning on going F/I it was the right decision.

mrgibs121 · July 27th, 2011, 01:22 PM

i say get one fabbed as long as they use stainless. dont let them get away with using just regular shitty aluminized steel that will rust in 4 days... 2.5 is fine even with nitrous, just make sure they make it as straight and with as few welds as possible. just as an example the 3" i just built for my car has 2 bends and thats it, 2 bends, 4 welds. fewer bends/welds = less turbulence = better flow.

PS: i never thanked you for the stockes

i got em in the mail last week. props on packing them like an expensive scientific instrument lol i was like wtf did he really use peanuts and bubble wrap on a big hunk of steel??

MACH1219 · August 4th, 2011, 04:41 PM

Quote:

Originally Posted by trevroar

If you're planning on upgrading your headers, or eliminating catalytic converters then buying a catback system is a waste of money as they were intended to be used with stock exhaust from the cat forward.

this is not true.

rycyeroc · August 4th, 2011, 04:50 PM

I'm considering getting OBX headers on my GT and also a magnaflow cat back. Would this combo work well? Would it make more sense to get the headers put on and just have a shop do piping to a magnaflow muffler?

Steveo · August 4th, 2011, 04:57 PM

^ that's what I would do and kind did

MACH1219 · August 5th, 2011, 07:06 AM

shops cant do mandral bends, which is an advantage of the cat back

snakeeyes · August 5th, 2011, 11:19 AM

Quote:

Originally Posted by trevroar

If you're planning on upgrading your headers, or eliminating catalytic converters then buying a catback system is a waste of money as they were intended to be used with stock exhaust from the cat forward.

yes,this is true.the catback is tuned with the cat or cats on the car.you eliminate the cats with a catback exhaust and you will throw the tuned exhaust system off where there will be less scavenging.so imo,going 2.5" exhaust piping without any cats will be a loss !.if you have a header,and a 3rd cat,then the catback exhaust will work well

akley88 · August 5th, 2011, 11:22 AM

Quote:

Originally Posted by MACH1219

shops cant do mandral bends, which is an advantage of the cat back

says who. my shop does mandrel bends.

MACH1219 · August 5th, 2011, 04:37 PM

Most shops dont do mandrel bends

MACH1219 · August 5th, 2011, 04:46 PM

Quote:

Originally Posted by snakeeyes

yes,this is true.the catback is tuned with the cat or cats on the car.you eliminate the cats with a catback exhaust and you will throw the tuned exhaust system off where there will be less scavenging.so imo,going 2.5" exhaust piping without any cats will be a loss !.if you have a header,and a 3rd cat,then the catback exhaust will work well

Its a mass produced, highly profitable, emmisions legal, bolt on way to partially improve your exhaust, making them popular for the weekend mechanic and the companies who produce them. To say you should stop there and not do headers or other exhaust improvements, simply because you installed a cat back is ridiculous. Every vehicle model will respond differently depending on what other mods are done to it, and for a lot of them, a cat back is simply the beginning

snakeeyes · August 5th, 2011, 05:11 PM

who said anything about stopping there ? lol

MACH1219 · August 5th, 2011, 06:23 PM

you implied if u dont stop there, you are wasting your money, as a cat back will somehow be a negative with additional exhaust modifications. i disagree

snakeeyes · August 5th, 2011, 06:43 PM

you funny !

July 18th, 2011, 11:39 AM	#1 (permalink)
stangcobra Has A Big Member Name: Jake Join Date: Feb 2011 Location: Cary NC Vehicle: 01 svt cobra Posts: 1,215 Rep Power: 3	"Real" Catback vs fabricated catback Hey guys, I was wondering what the difference would be between buying a catback like the magnaflow one from rre, versus having an exhaust shop make up some new piping and use the axleback I have on there now. Would I see dramatically higher power gains by buying something like a magnaflow one or would it not really matter which route I went __________________ http://stancerocks.tumblr.com/

July 18th, 2011, 11:44 AM	#2 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,989 Rep Power: 4	if the diameter of the pipe is the same 2.5in it should not make a difference. . the resonator on the magnaflow is not restrctive . . the only difference u will get mainly is sound __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted Last edited by FeaRlezZ; July 18th, 2011 at 11:47 AM.

July 18th, 2011, 11:45 AM	#3 (permalink)
stangcobra Has A Big Member Name: Jake Join Date: Feb 2011 Location: Cary NC Vehicle: 01 svt cobra Posts: 1,215 Rep Power: 3	Any idea what the diameter of the pipe on the magnaflow is? I'm trying to decide whether 2.5" or 3" would be better for me __________________ http://stancerocks.tumblr.com/

July 18th, 2011, 11:45 AM	#4 (permalink)
akley88 illusionperformance Name: travis Join Date: Jul 2010 Location: Reading, PA Vehicle: 07 eclipse gs-n Posts: 5,637 Rep Power: 7	if your not fi then 2.5 is good __________________ Member of the giggle gas dark side The Fastest of the Slowest Nitrous Breathers the GS-N's 239whp/262wtq

July 18th, 2011, 11:48 AM	#5 (permalink)
stangcobra Has A Big Member Name: Jake Join Date: Feb 2011 Location: Cary NC Vehicle: 01 svt cobra Posts: 1,215 Rep Power: 3	what if I'm gonna run nitrous, 2.5 still good? __________________ http://stancerocks.tumblr.com/

		Club4G Forum : Mitsubishi Eclipse 4G Forums - 2006-2012 Eclipse Authority > Performance and Technical > 4G Eclipse GS/SE Specific
"Real" Catback vs fabricated catback

July 18th, 2011, 11:49 AM	#6 (permalink)
akley88 illusionperformance Name: travis Join Date: Jul 2010 Location: Reading, PA Vehicle: 07 eclipse gs-n Posts: 5,637 Rep Power: 7	yeah thats what i have __________________ Member of the giggle gas dark side The Fastest of the Slowest Nitrous Breathers the GS-N's 239whp/262wtq

July 18th, 2011, 11:51 AM	#7 (permalink)
Steveo Huge Member Name: Steve Join Date: May 2010 Location: Tampa FL Vehicle: 2006 Eclipse GT-N Posts: 1,895 Rep Power: 4	U don't need any more than 2.5. Only difference with a custom exhaust is usually sound and they can be cheaper in cost sometimes. I have a straight pipe done on mine because I Dont want stock piping after my headers __________________ Full Bolt On + Zex 75 wet shot ~ 353WHP~~327lbs TQ http://club4g.org/board/members-ride...ates-ride.html RIP Matt (bullet06) A great man you were. Last edited by Steveo; July 18th, 2011 at 07:39 PM.

July 18th, 2011, 11:52 AM	#8 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,989 Rep Power: 4	anyone straight pipe a gs with headers ? just want to know how it sounds . . __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted

July 18th, 2011, 11:55 AM	#11 (permalink)
snakeeyes 4g Fanatic Name: Loves haters ! Join Date: Feb 2011 Location: TN hills Vehicle: 09 5 speed manual Posts: 3,078 Rep Power: 5	the difference in a custom vs aftermarket is the mandrel bend. __________________ Modified

July 18th, 2011, 11:57 AM	#12 (permalink)
akley88 illusionperformance Name: travis Join Date: Jul 2010 Location: Reading, PA Vehicle: 07 eclipse gs-n Posts: 5,637 Rep Power: 7	heres how mine sounded. audio isnt the greatest. VID00004-20110430-1328.mp4 video by oakleyfreak88 - Photobucket __________________ Member of the giggle gas dark side The Fastest of the Slowest Nitrous Breathers the GS-N's 239whp/262wtq

July 18th, 2011, 12:07 PM	#13 (permalink)
muscles Black Irish Name: Ross Join Date: Jul 2009 Location: south carolina Vehicle: 2006/eclipse/gs Posts: 3,222 Rep Power: 6	yo akley did you have a aftermarket muffler on that clip or just stock? __________________ http://club4g.org/board/members-ride...cles-whip.html. http://www.cardomain.com/ride/391606...hback-coupe-3d

July 27th, 2011, 09:14 AM	#16 (permalink)
muscles Black Irish Name: Ross Join Date: Jul 2009 Location: south carolina Vehicle: 2006/eclipse/gs Posts: 3,222 Rep Power: 6	Aww gotcha. I have the apexi n1 on the end of my straight pipe with the silencer. Pretty good combo noise wise. __________________ http://club4g.org/board/members-ride...cles-whip.html. http://www.cardomain.com/ride/391606...hback-coupe-3d

July 27th, 2011, 10:19 AM	#17 (permalink)
akley88 illusionperformance Name: travis Join Date: Jul 2010 Location: Reading, PA Vehicle: 07 eclipse gs-n Posts: 5,637 Rep Power: 7	i might switch back to the aero muffler again just because it can be so much fun being loud __________________ Member of the giggle gas dark side The Fastest of the Slowest Nitrous Breathers the GS-N's 239whp/262wtq

July 27th, 2011, 10:36 AM	#18 (permalink)
muscles Black Irish Name: Ross Join Date: Jul 2009 Location: south carolina Vehicle: 2006/eclipse/gs Posts: 3,222 Rep Power: 6	Ha it has it perks. Like scaring girls holding up car wash signs. __________________ http://club4g.org/board/members-ride...cles-whip.html. http://www.cardomain.com/ride/391606...hback-coupe-3d

July 27th, 2011, 10:38 AM	#19 (permalink)
akley88 illusionperformance Name: travis Join Date: Jul 2010 Location: Reading, PA Vehicle: 07 eclipse gs-n Posts: 5,637 Rep Power: 7	yeah the only drawback is highway cruising is loud __________________ Member of the giggle gas dark side The Fastest of the Slowest Nitrous Breathers the GS-N's 239whp/262wtq

July 27th, 2011, 10:49 AM	#20 (permalink)
muscles Black Irish Name: Ross Join Date: Jul 2009 Location: south carolina Vehicle: 2006/eclipse/gs Posts: 3,222 Rep Power: 6	Yea when I had a cheap autozone muffler on that shit gave me a killer headache. __________________ http://club4g.org/board/members-ride...cles-whip.html. http://www.cardomain.com/ride/391606...hback-coupe-3d

July 27th, 2011, 11:01 AM	#21 (permalink)
trevroar Contributing Member! Name: Trevor Join Date: Jan 2010 Location: Endwell, NY Vehicle: 07 Spyder GS6 Posts: 1,422 Rep Power: 4	If you're planning on upgrading your headers, or eliminating catalytic converters then buying a catback system is a waste of money as they were intended to be used with stock exhaust from the cat forward. __________________ *V6 Swap in Progress;* Fujita F5 CAI, MagnaFlow CatBack, Energy Suspension Bushing, KYB/Eibach Pro Kit Combo, TB Bypass, Ripp Mods F/R Poly Mounts, Iridium IX One Step Colder Plugs, 8k HIDs

July 27th, 2011, 12:42 PM	#22 (permalink)
NitroGlisson Soon to be SC'd :) Name: Don Glisson Join Date: Sep 2009 Location: Raleigh, NC Vehicle: 2008 Eclipse GT Posts: 25,369 Rep Power: 30	Some of the cat-backs out there aren't as advertised. The Aeon Imports cat-back for example was really a header back since it eliminated the rear cat. I guess they considered it a cat back since it left the pre-cats but I would have to disagree with their definition. I have a 3" exhaust on mine.....lost a little low-end torque but since I'm planning on going F/I it was the right decision. __________________ Mods: Nitro's Little Girl With Attitude

July 27th, 2011, 01:22 PM	#23 (permalink)
mrgibs121 Senior Member Join Date: Jun 2007 Vehicle: 2007 eclipse GS Posts: 379 Rep Power: 5	i say get one fabbed as long as they use stainless. dont let them get away with using just regular shitty aluminized steel that will rust in 4 days... 2.5 is fine even with nitrous, just make sure they make it as straight and with as few welds as possible. just as an example the 3" i just built for my car has 2 bends and thats it, 2 bends, 4 welds. fewer bends/welds = less turbulence = better flow. PS: i never thanked you for the stockes i got em in the mail last week. props on packing them like an expensive scientific instrument lol i was like wtf did he really use peanuts and bubble wrap on a big hunk of steel?? __________________ 07 eclipse GS MT,AEM FIC with harness, RRE UD pulley, TB coolant bypass, ACT 6 puck ceramic clutch, Fidanza 8.5lb flywheel, AEM UEGO wideband, WRX 440cc blue injectors, custom boosted @ 8psi on a gt35 clone snail, custom tubular turbo manifold, wyntonm BOV and wastegate, 3" turbo back with catalytic converter, bronze helical 2.6GPM oil scavenging system and secondary filter, tanabe strut tower bar, megan lowering springs

August 4th, 2011, 04:50 PM	#25 (permalink)
rycyeroc Member Name: Corey Join Date: May 2010 Location: North Port, FL Vehicle: 2006 Mits. Eclipse GT Posts: 51 Rep Power: 3	I'm considering getting OBX headers on my GT and also a magnaflow cat back. Would this combo work well? Would it make more sense to get the headers put on and just have a shop do piping to a magnaflow muffler?

August 4th, 2011, 04:57 PM	#26 (permalink)
Steveo Huge Member Name: Steve Join Date: May 2010 Location: Tampa FL Vehicle: 2006 Eclipse GT-N Posts: 1,895 Rep Power: 4	^ that's what I would do and kind did __________________ Full Bolt On + Zex 75 wet shot ~ 353WHP~~327lbs TQ http://club4g.org/board/members-ride...ates-ride.html RIP Matt (bullet06) A great man you were.

August 5th, 2011, 07:06 AM	#27 (permalink)
MACH1219 Senior Member Join Date: May 2011 Location: Warner Robins GA Vehicle: 2007 Spyder GS Posts: 278 Rep Power: 0	shops cant do mandral bends, which is an advantage of the cat back

August 5th, 2011, 04:37 PM	#30 (permalink)
MACH1219 Senior Member Join Date: May 2011 Location: Warner Robins GA Vehicle: 2007 Spyder GS Posts: 278 Rep Power: 0	Most shops dont do mandrel bends

August 5th, 2011, 05:11 PM	#32 (permalink)
snakeeyes 4g Fanatic Name: Loves haters ! Join Date: Feb 2011 Location: TN hills Vehicle: 09 5 speed manual Posts: 3,078 Rep Power: 5	who said anything about stopping there ? lol __________________ Modified

August 5th, 2011, 06:23 PM	#33 (permalink)
MACH1219 Senior Member Join Date: May 2011 Location: Warner Robins GA Vehicle: 2007 Spyder GS Posts: 278 Rep Power: 0	you implied if u dont stop there, you are wasting your money, as a cat back will somehow be a negative with additional exhaust modifications. i disagree

August 5th, 2011, 06:43 PM	#34 (permalink)
snakeeyes 4g Fanatic Name: Loves haters ! Join Date: Feb 2011 Location: TN hills Vehicle: 09 5 speed manual Posts: 3,078 Rep Power: 5	you funny ! __________________ Modified

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