Rear catalytic - Club4G Forum : Mitsubishi Eclipse 4G Forums - 2006-2012 Eclipse Authority

Julian91 · July 30th, 2011, 09:42 AM

I just took out the rear catalytic bc my front one broke and I guess it clogged up the rear one my car was riding shitty and I was getting so pissed so I bought the front catalytic and cut out the rear one and my car is running a lot stronger. I did not know that rear catalytic holds back so much power. Now am ready for the next step in power increase

snakeeyes · July 30th, 2011, 11:15 AM

with the rre header.the dyno showed 159 hp.after the removal of the 3rd cat.the dyno showed 172 hp.take it for what its worth

Steveo · July 30th, 2011, 11:47 AM

When I took all 3 out I noticed such a big gain in power and it felt smoother

akley88 · July 30th, 2011, 01:20 PM

same here. plus you get to smell all of that uncleaned exhaust coming out

Julian91 · July 30th, 2011, 03:38 PM

Quote:

Originally Posted by Steveo

When I took all 3 out I noticed such a big gain in power and it felt smoother

You took out three catalyst out? I thought there was 2 and the silencer?

Julian91 · July 30th, 2011, 03:42 PM

Quote:

Originally Posted by snakeeyes

with the rre header.the dyno showed 159 hp.after the removal of the 3rd cat.the dyno showed 172 hp.take it for what its worth

When you installed the rre headers did the check engine light pop up?

akley88 · July 30th, 2011, 03:43 PM

Quote:

Originally Posted by Julian91

You took out three catalyst out? I thought there was 2 and the silencer?

there are 2 precats in the header and a third in the piping.

Julian91 · July 30th, 2011, 03:50 PM

Ohh ok yeah now under stand I was counting the 1st 2 as one since there together. I would change the first one an add the headers but i was told the check engine light would come on bc of the sensor and check engine light is annoying! Is that true?

akley88 · July 30th, 2011, 03:55 PM

spacers on the post cat o2 sensors will eliminate that from happening.

Julian91 · July 30th, 2011, 09:34 PM

How much are spacers?

FeaRlezZ · July 30th, 2011, 09:54 PM

wut about a high flow cat . . does that make a big difference as well compared to stock. . and u dont get engine light with high flow cat do u

akley88 · July 30th, 2011, 09:59 PM

the third cat isnt monitored so no light.

FeaRlezZ · July 30th, 2011, 10:05 PM

oh seriously . . but u would still fail inspection right . . if not imma rip that b!tch out

gspower · July 30th, 2011, 10:31 PM

i always get confused at this, so, in order, its 2 precats in the manifold, the "3rd cat" immidiately after the manifold, the resonator, then the muffler, correct?

FeaRlezZ · July 30th, 2011, 10:32 PM

^ correct

gspower · July 30th, 2011, 10:36 PM

is the third cat bolted onto the manifold, or is it, manifold>pipe>third cat? i ask cuz if its manifold then pipe, then my shop will tear it out, if its bolted on, well then its a bit of a pickle

FeaRlezZ · July 30th, 2011, 10:47 PM

ur headers bolt on to the beginning of the y-pipe of course . . then the end of the y-pipe has a bolt on clamp/gasket thing that connects to the 3rd cat . . no more bolted pipes after that . . depending on wut ur setup is now its either just clamped or welded

FeaRlezZ · July 30th, 2011, 11:00 PM

is it possible to pass inspection with no 3rd cat

joeyb · July 31st, 2011, 12:04 AM

^in some states yes, in some no. but what do I know? OKlahoma has no such bullshit to deal with.

akley88 · July 31st, 2011, 05:41 AM

yeah you can pass with no cats in pa

gspower · July 31st, 2011, 10:10 AM

what will this do to the sound of the exhaust, i dont wanna sound like a fuckin honda

FeaRlezZ · July 31st, 2011, 06:58 PM

im in ma and they are usually cool here . . no front plate required lol

FeaRlezZ · July 31st, 2011, 07:04 PM

and yes if headers / 3rd cat delete / magnaflow catback does not sount like rice being shaken in a can then i will def remove the cat

gspower · July 31st, 2011, 07:07 PM

i has no header, just straight pipe and muffler no resonator
anybody wanna chime in on the 3rd cat sound result?

snakeeyes · July 31st, 2011, 07:38 PM

no header,3rd cat delete,stock rear resonator and a universal mag.deep,no drone,no rice sound here.sounds great,especailly under a bridge during aclleration.worse case scenerio,try it,dont like it,put it back on

gspower · July 31st, 2011, 07:41 PM

sound clip bro??

snakeeyes · July 31st, 2011, 08:07 PM

dont have one right now.what i can tell you is if you dont have a universal mag,it will be loud ! hence the reason i had to go back to the muffler shop 3 times before i was happy.do you still have your oem res ? if so put it back on and it will sound good depending on the muffler you have.the mag muffler is where its at toning down this engine

Julian91 · July 31st, 2011, 08:26 PM

I know after I put on the header with the magnaflow exhaust it's going to sound beast lol

FeaRlezZ · July 31st, 2011, 08:31 PM

i have the magnaflow resonator on the cat-back exhaust so that should help keep the sound from being rediculous . . im bout to do this . . so will i just need to weld a pipe on where the cat was or can it b clamped . .and should i replace the entire pipe ( from y-pipe to resonator) ??

snakeeyes · July 31st, 2011, 08:46 PM

so you have dual exhaust and 2.5" piping ? if so,you better leave it alone or dont make it permanent until you have tested the performance of the car

FeaRlezZ · July 31st, 2011, 08:48 PM

^ no just a single pipe

snakeeyes · July 31st, 2011, 09:02 PM

then yea,just weld a straight pipe the same size as the rest of the piping in its place.leave your self some welding room on the pipe in case you want to put it back on

FeaRlezZ · July 31st, 2011, 09:12 PM

^ do u have the same setup as me snake . . headers / 3rd cat delete ( im about to do ) / and magnaflow cat-back

snakeeyes · July 31st, 2011, 09:15 PM

no header for me yet.only 3rd cat delete,2.25 piping,oem res and a straight shot mag

FeaRlezZ · July 31st, 2011, 09:22 PM

well i feel comfortable removing it so thats wut i will do . . stock piping is 2.5 or 2.25 ?? how tha fuk did i forget

snakeeyes · July 31st, 2011, 09:26 PM

2.129 is stock

FeaRlezZ · July 31st, 2011, 09:31 PM

thanks for the info snake

FeaRlezZ · August 1st, 2011, 12:55 PM

one more thing . . r the pipes from auto zone or somewhere quality pipes ??

July 30th, 2011, 09:42 AM	#1 (permalink)
Julian91 Member Join Date: Apr 2010 Posts: 87 Rep Power: 3	Rear catalytic I just took out the rear catalytic bc my front one broke and I guess it clogged up the rear one my car was riding shitty and I was getting so pissed so I bought the front catalytic and cut out the rear one and my car is running a lot stronger. I did not know that rear catalytic holds back so much power. Now am ready for the next step in power increase

July 30th, 2011, 11:15 AM	#2 (permalink)
snakeeyes 4g Fanatic Name: Loves haters ! Join Date: Feb 2011 Location: TN hills Vehicle: 09 5 speed manual Posts: 3,149 Rep Power: 5	with the rre header.the dyno showed 159 hp.after the removal of the 3rd cat.the dyno showed 172 hp.take it for what its worth __________________ Modified Last edited by snakeeyes; July 30th, 2011 at 11:17 AM.

July 30th, 2011, 11:47 AM	#3 (permalink)
Steveo Huge Member Name: Steve Join Date: May 2010 Location: Tampa FL Vehicle: 2006 Eclipse GT-N Posts: 1,904 Rep Power: 4	When I took all 3 out I noticed such a big gain in power and it felt smoother __________________ 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.

July 30th, 2011, 01:20 PM	#4 (permalink)
akley88 illusionperformance Name: travis Join Date: Jul 2010 Location: Reading, PA Vehicle: 07 eclipse gs-n Posts: 5,698 Rep Power: 7	same here. plus you get to smell all of that uncleaned exhaust coming out __________________ Member of the giggle gas dark side The Fastest of the Slowest Nitrous Breathers the GS-N's 239whp/262wtq

July 30th, 2011, 03:55 PM	#9 (permalink)
akley88 illusionperformance Name: travis Join Date: Jul 2010 Location: Reading, PA Vehicle: 07 eclipse gs-n Posts: 5,698 Rep Power: 7	spacers on the post cat o2 sensors will eliminate that from happening. __________________ Member of the giggle gas dark side The Fastest of the Slowest Nitrous Breathers the GS-N's 239whp/262wtq

		Club4G Forum : Mitsubishi Eclipse 4G Forums - 2006-2012 Eclipse Authority > Performance and Technical > Eclipse Performance
Rear catalytic

July 30th, 2011, 03:50 PM	#8 (permalink)
Julian91 Member Join Date: Apr 2010 Posts: 87 Rep Power: 3	Ohh ok yeah now under stand I was counting the 1st 2 as one since there together. I would change the first one an add the headers but i was told the check engine light would come on bc of the sensor and check engine light is annoying! Is that true?

July 30th, 2011, 09:34 PM	#10 (permalink)
Julian91 Member Join Date: Apr 2010 Posts: 87 Rep Power: 3	How much are spacers?

July 30th, 2011, 09:54 PM	#11 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,999 Rep Power: 4	wut about a high flow cat . . does that make a big difference as well compared to stock. . and u dont get engine light with high flow cat do u __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted

July 30th, 2011, 09:59 PM	#12 (permalink)
akley88 illusionperformance Name: travis Join Date: Jul 2010 Location: Reading, PA Vehicle: 07 eclipse gs-n Posts: 5,698 Rep Power: 7	the third cat isnt monitored so no light. __________________ Member of the giggle gas dark side The Fastest of the Slowest Nitrous Breathers the GS-N's 239whp/262wtq

July 30th, 2011, 10:05 PM	#13 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,999 Rep Power: 4	oh seriously . . but u would still fail inspection right . . if not imma rip that b!tch out __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted

July 30th, 2011, 10:31 PM	#14 (permalink)
gspower Senior Member Name: Cesar Join Date: Oct 2010 Vehicle: 2008 Generic Veyron Posts: 1,772 Rep Power: 3	i always get confused at this, so, in order, its 2 precats in the manifold, the "3rd cat" immidiately after the manifold, the resonator, then the muffler, correct? __________________ DC Sports CAI, D2 RS Coilovers, Aero Body Kit, E4E M style lip, RA eyelids, APEXi N1, 20MM Ichiba V2, Glowshift Dual Gauge Pod,Debadged, 19x8.5 Ruff Racing R930, Nexen 245/35ZR/19,10000k HID, Tinted tailights, Custom Painted Front Center And Back Center Bumper Gloss Black, Custom Painted OEM Hood, Ralliart Tower Bar, Glowshift Digital Volts/Oil Pressure Gauges http://club4g.org/board/members-ride...bombshell.html

July 30th, 2011, 10:32 PM	#15 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,999 Rep Power: 4	^ correct __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted

July 30th, 2011, 10:36 PM	#16 (permalink)
gspower Senior Member Name: Cesar Join Date: Oct 2010 Vehicle: 2008 Generic Veyron Posts: 1,772 Rep Power: 3	is the third cat bolted onto the manifold, or is it, manifold>pipe>third cat? i ask cuz if its manifold then pipe, then my shop will tear it out, if its bolted on, well then its a bit of a pickle __________________ DC Sports CAI, D2 RS Coilovers, Aero Body Kit, E4E M style lip, RA eyelids, APEXi N1, 20MM Ichiba V2, Glowshift Dual Gauge Pod,Debadged, 19x8.5 Ruff Racing R930, Nexen 245/35ZR/19,10000k HID, Tinted tailights, Custom Painted Front Center And Back Center Bumper Gloss Black, Custom Painted OEM Hood, Ralliart Tower Bar, Glowshift Digital Volts/Oil Pressure Gauges http://club4g.org/board/members-ride...bombshell.html

July 30th, 2011, 10:47 PM	#17 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,999 Rep Power: 4	ur headers bolt on to the beginning of the y-pipe of course . . then the end of the y-pipe has a bolt on clamp/gasket thing that connects to the 3rd cat . . no more bolted pipes after that . . depending on wut ur setup is now its either just clamped or welded __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted

July 30th, 2011, 11:00 PM	#18 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,999 Rep Power: 4	is it possible to pass inspection with no 3rd cat __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted

July 31st, 2011, 12:04 AM	#19 (permalink)
joeyb Hard Core 4ger Name: Joe Join Date: Jun 2009 Location: Norman, OK Vehicle: 08 Eclipse GT - SC Posts: 9,334 Rep Power: 14	^in some states yes, in some no. but what do I know? OKlahoma has no such bullshit to deal with. __________________ "Has blower and many modifications." ~347 WHP / ~309 WTQ / ~6 lbs Boost

July 31st, 2011, 05:41 AM	#20 (permalink)
akley88 illusionperformance Name: travis Join Date: Jul 2010 Location: Reading, PA Vehicle: 07 eclipse gs-n Posts: 5,698 Rep Power: 7	yeah you can pass with no cats in pa __________________ Member of the giggle gas dark side The Fastest of the Slowest Nitrous Breathers the GS-N's 239whp/262wtq

July 31st, 2011, 10:10 AM	#21 (permalink)
gspower Senior Member Name: Cesar Join Date: Oct 2010 Vehicle: 2008 Generic Veyron Posts: 1,772 Rep Power: 3	what will this do to the sound of the exhaust, i dont wanna sound like a fuckin honda __________________ DC Sports CAI, D2 RS Coilovers, Aero Body Kit, E4E M style lip, RA eyelids, APEXi N1, 20MM Ichiba V2, Glowshift Dual Gauge Pod,Debadged, 19x8.5 Ruff Racing R930, Nexen 245/35ZR/19,10000k HID, Tinted tailights, Custom Painted Front Center And Back Center Bumper Gloss Black, Custom Painted OEM Hood, Ralliart Tower Bar, Glowshift Digital Volts/Oil Pressure Gauges http://club4g.org/board/members-ride...bombshell.html

July 31st, 2011, 06:58 PM	#22 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,999 Rep Power: 4	im in ma and they are usually cool here . . no front plate required lol __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted

July 31st, 2011, 07:04 PM	#23 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,999 Rep Power: 4	and yes if headers / 3rd cat delete / magnaflow catback does not sount like rice being shaken in a can then i will def remove the cat __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted

July 31st, 2011, 07:07 PM	#24 (permalink)
gspower Senior Member Name: Cesar Join Date: Oct 2010 Vehicle: 2008 Generic Veyron Posts: 1,772 Rep Power: 3	i has no header, just straight pipe and muffler no resonator anybody wanna chime in on the 3rd cat sound result? __________________ DC Sports CAI, D2 RS Coilovers, Aero Body Kit, E4E M style lip, RA eyelids, APEXi N1, 20MM Ichiba V2, Glowshift Dual Gauge Pod,Debadged, 19x8.5 Ruff Racing R930, Nexen 245/35ZR/19,10000k HID, Tinted tailights, Custom Painted Front Center And Back Center Bumper Gloss Black, Custom Painted OEM Hood, Ralliart Tower Bar, Glowshift Digital Volts/Oil Pressure Gauges http://club4g.org/board/members-ride...bombshell.html

July 31st, 2011, 07:38 PM	#25 (permalink)
snakeeyes 4g Fanatic Name: Loves haters ! Join Date: Feb 2011 Location: TN hills Vehicle: 09 5 speed manual Posts: 3,149 Rep Power: 5	no header,3rd cat delete,stock rear resonator and a universal mag.deep,no drone,no rice sound here.sounds great,especailly under a bridge during aclleration.worse case scenerio,try it,dont like it,put it back on __________________ Modified

July 31st, 2011, 07:41 PM	#26 (permalink)
gspower Senior Member Name: Cesar Join Date: Oct 2010 Vehicle: 2008 Generic Veyron Posts: 1,772 Rep Power: 3	sound clip bro?? __________________ DC Sports CAI, D2 RS Coilovers, Aero Body Kit, E4E M style lip, RA eyelids, APEXi N1, 20MM Ichiba V2, Glowshift Dual Gauge Pod,Debadged, 19x8.5 Ruff Racing R930, Nexen 245/35ZR/19,10000k HID, Tinted tailights, Custom Painted Front Center And Back Center Bumper Gloss Black, Custom Painted OEM Hood, Ralliart Tower Bar, Glowshift Digital Volts/Oil Pressure Gauges http://club4g.org/board/members-ride...bombshell.html

July 31st, 2011, 08:07 PM	#27 (permalink)
snakeeyes 4g Fanatic Name: Loves haters ! Join Date: Feb 2011 Location: TN hills Vehicle: 09 5 speed manual Posts: 3,149 Rep Power: 5	dont have one right now.what i can tell you is if you dont have a universal mag,it will be loud ! hence the reason i had to go back to the muffler shop 3 times before i was happy.do you still have your oem res ? if so put it back on and it will sound good depending on the muffler you have.the mag muffler is where its at toning down this engine __________________ Modified Last edited by snakeeyes; July 31st, 2011 at 08:09 PM.

July 31st, 2011, 08:26 PM	#28 (permalink)
Julian91 Member Join Date: Apr 2010 Posts: 87 Rep Power: 3	I know after I put on the header with the magnaflow exhaust it's going to sound beast lol

July 31st, 2011, 08:31 PM	#29 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,999 Rep Power: 4	i have the magnaflow resonator on the cat-back exhaust so that should help keep the sound from being rediculous . . im bout to do this . . so will i just need to weld a pipe on where the cat was or can it b clamped . .and should i replace the entire pipe ( from y-pipe to resonator) ?? __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted Last edited by FeaRlezZ; July 31st, 2011 at 08:36 PM.

July 31st, 2011, 08:46 PM	#30 (permalink)
snakeeyes 4g Fanatic Name: Loves haters ! Join Date: Feb 2011 Location: TN hills Vehicle: 09 5 speed manual Posts: 3,149 Rep Power: 5	so you have dual exhaust and 2.5" piping ? if so,you better leave it alone or dont make it permanent until you have tested the performance of the car __________________ Modified

July 31st, 2011, 08:48 PM	#31 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,999 Rep Power: 4	^ no just a single pipe __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted

July 31st, 2011, 09:02 PM	#32 (permalink)
snakeeyes 4g Fanatic Name: Loves haters ! Join Date: Feb 2011 Location: TN hills Vehicle: 09 5 speed manual Posts: 3,149 Rep Power: 5	then yea,just weld a straight pipe the same size as the rest of the piping in its place.leave your self some welding room on the pipe in case you want to put it back on __________________ Modified

July 31st, 2011, 09:12 PM	#33 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,999 Rep Power: 4	^ do u have the same setup as me snake . . headers / 3rd cat delete ( im about to do ) / and magnaflow cat-back __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted

July 31st, 2011, 09:15 PM	#34 (permalink)
snakeeyes 4g Fanatic Name: Loves haters ! Join Date: Feb 2011 Location: TN hills Vehicle: 09 5 speed manual Posts: 3,149 Rep Power: 5	no header for me yet.only 3rd cat delete,2.25 piping,oem res and a straight shot mag __________________ Modified

July 31st, 2011, 09:22 PM	#35 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,999 Rep Power: 4	well i feel comfortable removing it so thats wut i will do . . stock piping is 2.5 or 2.25 ?? how tha fuk did i forget __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted

July 31st, 2011, 09:26 PM	#36 (permalink)
snakeeyes 4g Fanatic Name: Loves haters ! Join Date: Feb 2011 Location: TN hills Vehicle: 09 5 speed manual Posts: 3,149 Rep Power: 5	2.129 is stock __________________ Modified

July 31st, 2011, 09:31 PM	#37 (permalink)
FeaRlezZ tUNED. Name: Brian Join Date: Sep 2010 Location: Boston, MA Vehicle: 2009 4G69 Posts: 2,999 Rep Power: 4	thanks for the info snake __________________ AEM FIC / UEGO Wideband + POD / Custom Bolted