J2 Cat Back Exhaust for 2.4 sedan - Drive Accord Honda Forums | radio-pro.ru
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post #1 of 24 Old 03-12-2014, 07:59 PM Thread Starter
2010 EX 4dr VTEC 2.4L

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J2 Cat Back Exhaust for 2.4 sedan

I saw them on BRZ's.
Couldn't find any 8th gen sedans with them installed.
My mechanic friend says they're not bad.
Anyone seen them installed on a 8th gen sedan?

P.S. I need to install new cat back. I


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post #2 of 24 Old 03-13-2014, 03:26 PM Thread Starter
2010 EX 4dr VTEC 2.4L

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Ok. I guess no one has seen.
I've decided to be the guinea pig for this cat back.
I'm still talking with the sales rep to knock the price down if I don't want the downpipe. I have a high flow cat installed and their downpipe is catless.
So I guess technically J2 isn't just a cat back because it includes the catless downpipe. Correct me if I'm wrong and call me stupid.

EDIT: Forgot to link it.




Tuned w/ KTuner
Takeda SRI
J2 Catback w/custom 2'5" straight pipe
RV-6 High Flow Cat
RV-6 PCD Downpipe
Unorthodox Racing Pulleys
Sprint Booster V2 Throttle Remapper
P2R Throttle Body Spacer
Inspire Trunk Conversion
StopTech Drilled & Slotted Rotors (all 4)
Alpine PLV-7 LAT Woofer w/ Momentum 2000W
P-81ACRD In-dash Navi
8000K HID
Spec-D Smoked LED Tail Lights
V6 Front & Rear Bumper
OEM JDM Red Honda Emblems
OEM Style Spoiler
Rear Roof Spoiler
Mugen Style Wing Spoiler
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post #3 of 24 Old 03-13-2014, 04:22 PM
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It was brought up last week, not too hard to find with a google. I'm not really impressed by something the same size as the LX exhaust and claims "Dyno Proven to Instantly Increases 15 -25 Horsepower/ Low End Torque"

2012 Accord EX-L AT V6 Sdn Crystal Black Pearl / Ivory (
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post #4 of 24 Old 03-13-2014, 07:00 PM
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I dont know if this is the exact exhaust that you were looking at but best I could do on youtube for a sound clip.
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post #5 of 24 Old 03-15-2014, 01:18 AM Thread Starter
2010 EX 4dr VTEC 2.4L

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ty for the clip kmartinez1337

Tuned w/ KTuner
Takeda SRI
J2 Catback w/custom 2'5" straight pipe
RV-6 High Flow Cat
RV-6 PCD Downpipe
Unorthodox Racing Pulleys
Sprint Booster V2 Throttle Remapper
P2R Throttle Body Spacer
Inspire Trunk Conversion
StopTech Drilled & Slotted Rotors (all 4)
Alpine PLV-7 LAT Woofer w/ Momentum 2000W
P-81ACRD In-dash Navi
8000K HID
Spec-D Smoked LED Tail Lights
V6 Front & Rear Bumper
OEM JDM Red Honda Emblems
OEM Style Spoiler
Rear Roof Spoiler
Mugen Style Wing Spoiler
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post #6 of 24 Old 03-18-2014, 11:47 PM Thread Starter
2010 EX 4dr VTEC 2.4L

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Just ordered them.
"dyno proven 15hp ~ 25hp"
I should report for false claim xD. I don't see how that would be possible on an aspirated engine with just a cat back.

Tuned w/ KTuner
Takeda SRI
J2 Catback w/custom 2'5" straight pipe
RV-6 High Flow Cat
RV-6 PCD Downpipe
Unorthodox Racing Pulleys
Sprint Booster V2 Throttle Remapper
P2R Throttle Body Spacer
Inspire Trunk Conversion
StopTech Drilled & Slotted Rotors (all 4)
Alpine PLV-7 LAT Woofer w/ Momentum 2000W
P-81ACRD In-dash Navi
8000K HID
Spec-D Smoked LED Tail Lights
V6 Front & Rear Bumper
OEM JDM Red Honda Emblems
OEM Style Spoiler
Rear Roof Spoiler
Mugen Style Wing Spoiler
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post #7 of 24 Old 03-28-2014, 04:21 AM
09 Accord Ex Silver I4

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An shop wanted me to buy one and I was running into the same problem as you since I see no sound vids or people with them were you able to get better price than $420?

09 Accord Coupe Ex Silver
-Fujita SRI, TORQUE SOLUTION TB Throttle Body Spacer, custom piping Dual Magnaflow conversions
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Next up or trade in: custom exterior matching black and silver seats, wheels & rims, underdrive pulleys, maybe an pre cat experiment,
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post #8 of 24 Old 03-29-2014, 05:16 AM Thread Starter
2010 EX 4dr VTEC 2.4L

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Sent u a PM but I ordered them $340 shipped.

Tuned w/ KTuner
Takeda SRI
J2 Catback w/custom 2'5" straight pipe
RV-6 High Flow Cat
RV-6 PCD Downpipe
Unorthodox Racing Pulleys
Sprint Booster V2 Throttle Remapper
P2R Throttle Body Spacer
Inspire Trunk Conversion
StopTech Drilled & Slotted Rotors (all 4)
Alpine PLV-7 LAT Woofer w/ Momentum 2000W
P-81ACRD In-dash Navi
8000K HID
Spec-D Smoked LED Tail Lights
V6 Front & Rear Bumper
OEM JDM Red Honda Emblems
OEM Style Spoiler
Rear Roof Spoiler
Mugen Style Wing Spoiler
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post #9 of 24 Old 03-31-2014, 07:32 PM
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j2 actually has an site for this exhaust they sell they list it at $360 but of course they have no sound clips for their own product they also list all of the claims above for it

maybe all those hp claims are coming from the fact that they include their own illegal down pipe and removes the cat
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09 Accord Coupe Ex Silver
-Fujita SRI, TORQUE SOLUTION TB Throttle Body Spacer, custom piping Dual Magnaflow conversions
5w-20 Royal Purple syn
(regular ol legal window tint)

Next up or trade in: custom exterior matching black and silver seats, wheels & rims, underdrive pulleys, maybe an pre cat experiment,
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post #10 of 24 Old 04-01-2014, 07:42 PM Thread Starter
2010 EX 4dr VTEC 2.4L

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Quote:
Originally Posted by semeoneor View Post
maybe all those hp claims are coming from the fact that they include their own illegal down pipe and removes the cat
That's most definitely why. I wouldn't recommend installing a downpipe for a car that has no ecu tune. Your engine will be damaged over time with out a proper tune. I'm not installing the downpipe on mine. Yet.

Tuned w/ KTuner
Takeda SRI
J2 Catback w/custom 2'5" straight pipe
RV-6 High Flow Cat
RV-6 PCD Downpipe
Unorthodox Racing Pulleys
Sprint Booster V2 Throttle Remapper
P2R Throttle Body Spacer
Inspire Trunk Conversion
StopTech Drilled & Slotted Rotors (all 4)
Alpine PLV-7 LAT Woofer w/ Momentum 2000W
P-81ACRD In-dash Navi
8000K HID
Spec-D Smoked LED Tail Lights
V6 Front & Rear Bumper
OEM JDM Red Honda Emblems
OEM Style Spoiler
Rear Roof Spoiler
Mugen Style Wing Spoiler
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post #11 of 24 Old 04-02-2014, 12:29 AM
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Quote:
Originally Posted by tkdboi View Post
That's most definitely why. I wouldn't recommend installing a downpipe for a car that has no ecu tune. Your engine will be damaged over time with out a proper tune. I'm not installing the downpipe on mine. Yet.
There will be no damage to engine with a downpipe... the ONLY thing that will be hurting is no back pressure. Otherwise prove me wrong

Car history:
1990 Toyota Corolla 1.6 (4AFE)--> 1990 Mitsubishi Eclipse GSX 2.0T (4G63T)--> 2000 Toyota Camry 2.2(5SFE)--> 1995 Nissan Altima 2.4 (KA24DE)--> 2012 Honda Accord EX 2.4 (K24Z3)

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post #12 of 24 Old 04-02-2014, 07:39 PM Thread Starter
2010 EX 4dr VTEC 2.4L

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Quote:
Originally Posted by 4G63attack View Post
There will be no damage to engine with a downpipe... the ONLY thing that will be hurting is no back pressure. Otherwise prove me wrong
Then by all means install it and find out.

Tuned w/ KTuner
Takeda SRI
J2 Catback w/custom 2'5" straight pipe
RV-6 High Flow Cat
RV-6 PCD Downpipe
Unorthodox Racing Pulleys
Sprint Booster V2 Throttle Remapper
P2R Throttle Body Spacer
Inspire Trunk Conversion
StopTech Drilled & Slotted Rotors (all 4)
Alpine PLV-7 LAT Woofer w/ Momentum 2000W
P-81ACRD In-dash Navi
8000K HID
Spec-D Smoked LED Tail Lights
V6 Front & Rear Bumper
OEM JDM Red Honda Emblems
OEM Style Spoiler
Rear Roof Spoiler
Mugen Style Wing Spoiler
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post #13 of 24 Old 04-02-2014, 07:49 PM
09 Accord Ex Silver I4

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Hope that j2 works out the same or better than the other options on the market ill be attempting to replace my damaged exhaust system late april

09 Accord Coupe Ex Silver
-Fujita SRI, TORQUE SOLUTION TB Throttle Body Spacer, custom piping Dual Magnaflow conversions
5w-20 Royal Purple syn
(regular ol legal window tint)

Next up or trade in: custom exterior matching black and silver seats, wheels & rims, underdrive pulleys, maybe an pre cat experiment,
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post #14 of 24 Old 04-02-2014, 08:55 PM
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Quote:
Originally Posted by tkdboi View Post
Then by all means install it and find out.
Why, Yes I did install a Down pipe and its 3 inch all the way to the muffler.

Car history:
1990 Toyota Corolla 1.6 (4AFE)--> 1990 Mitsubishi Eclipse GSX 2.0T (4G63T)--> 2000 Toyota Camry 2.2(5SFE)--> 1995 Nissan Altima 2.4 (KA24DE)--> 2012 Honda Accord EX 2.4 (K24Z3)

Dream Cars:
Aston Martin DBS, Maserati GT, Caterham 7 (aka Louts Super 7)


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post #15 of 24 Old 04-19-2014, 08:03 PM Thread Starter
2010 EX 4dr VTEC 2.4L

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Quote:
Originally Posted by 4G63attack View Post
Why, Yes I did install a Down pipe and its 3 inch all the way to the muffler.
SCREW IT!
I installed the J2 catback finally and also installed the downpipe and I'm taking your word for it.
This is how it sounds from the inside.


How did you get 3 inch piping for your catback?
Please share.


From outside...



Tuned w/ KTuner
Takeda SRI
J2 Catback w/custom 2'5" straight pipe
RV-6 High Flow Cat
RV-6 PCD Downpipe
Unorthodox Racing Pulleys
Sprint Booster V2 Throttle Remapper
P2R Throttle Body Spacer
Inspire Trunk Conversion
StopTech Drilled & Slotted Rotors (all 4)
Alpine PLV-7 LAT Woofer w/ Momentum 2000W
P-81ACRD In-dash Navi
8000K HID
Spec-D Smoked LED Tail Lights
V6 Front & Rear Bumper
OEM JDM Red Honda Emblems
OEM Style Spoiler
Rear Roof Spoiler
Mugen Style Wing Spoiler
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