cat remove

Ohbev · 10-02-2009, 04:25 AM

Hi

If i remove the secondery cats. but leave the front cats and res. will i gain a little power or sound? Some one told me i might loss hp any truth in that?

Bev

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shardul · 10-02-2009, 09:39 AM

i got rid to the secondary cats and the resonators. I put a 3 inch straight pipe instead, it was a bad decision because i lost low end torque, both the banks were independent.
now i have put a x pipe in the system and the car has regained the torque.
you can remove the cats and factory H pipe but make sure you put a x pipe as close to the headers as possible.

nanayaw6 · 10-02-2009, 01:08 PM

How much power is gained from this mod and dou you by chance have a sound/video clip?

gsw1 · 10-02-2009, 02:42 PM

www.fabspeed.com

bigswin · 10-02-2009, 03:17 PM

I just had my secondary cats and resonator removed on Monday. I honestly don't feel any difference but the sound is a vast improvement. Definitely more growl coming out the back but still quiet inside the cabin. I decided against the x and h pipes and ran 3" straight pipes. I was beating my buddy with a stock E55 at the track on Tuesday so I'm not worried about "losing" anything.

jikjak · 10-02-2009, 04:22 PM

im just wondering why the x pipe should be closer to the headers.
does it really make more tq if they are closer to the front?

im running a catless system and my xpipe is near the back, in place of the resonators.
is there anything wrong with having it that way?

Ohbev · 10-02-2009, 06:07 PM

What about if i just cut off the 2 cats and fit 2 pipes in there places and leave the stock H pipe ? will that work fine ?

bigswin · 10-02-2009, 06:18 PM

Quote:

Originally Posted by Ohbev

What about if i just cut off the 2 cats and fit 2 pipes in there places and leave the stock H pipe ? will that work fine ?

are you talking about the resonator?

E55Bullet · 10-02-2009, 07:32 PM

stock H pipe is below the "headers" and right before the secondary cats. I cut my secondaries off in between the H pipe and cats. And put in straights. No loss in torque. Im putting down over 550 rwt with my mods

Triple.Sevens · 10-02-2009, 07:47 PM

Are we allowed to remove secondary cats and resonators in California? Will it pass smog. Yeah our emission laws suck same with the gun laws.

bigswin · 10-02-2009, 09:49 PM

Indiana is super chill. I have no requirement for smog tests and I've got a .45 under the seat.

E55Bullet · 10-02-2009, 11:12 PM

my .40 fits nicely in the door =)

bigswin · 10-03-2009, 09:47 AM

Quote:

Originally Posted by E55Bullet

my .40 fits nicely in the door =)

haha, that's awesome. I like mine in the door under the seat b/c it doesn't move around.

10-02-2009, 09:39 AM	#2
shardul MBWorld Fanatic! Join Date: May 2008 Location: Houston Posts: 1,389 Drives: 2003 W211 E55	i got rid to the secondary cats and the resonators. I put a 3 inch straight pipe instead, it was a bad decision because i lost low end torque, both the banks were independent. now i have put a x pipe in the system and the car has regained the torque. you can remove the cats and factory H pipe but make sure you put a x pipe as close to the headers as possible. __________________ "Lieber Nurburgring als Ehering"

10-02-2009, 07:32 PM	#9
E55Bullet Member Join Date: Apr 2009 Location: Lafayette, IN Posts: 183 Drives: 2006 E55	stock H pipe is below the "headers" and right before the secondary cats. I cut my secondaries off in between the H pipe and cats. And put in straights. No loss in torque. Im putting down over 550 rwt with my mods __________________ -Rear Cat Delete -Res. Delete -172mm LET Pulley -Eurocharged Heat Exchanger -Eurocharged Custom Tune -CM90 Johnson Pump - -10 thermostat mod -S55 Driver's Side intake tube -K&N's -5% Tint 35% windshield -Mandrus Millenium Wheels -Nitto 555R's 285/35/18 -Front and Rear EBC Yellow Stuff Pads "It's more like a Hammer, a bit clumsy, but it will still kill you."

10-02-2009, 07:47 PM	#10
Triple.Sevens Junior Member Join Date: May 2008 Location: Bay Area, Cali Posts: 31 Drives: 2006 E55 AMG	Are we allowed to remove secondary cats and resonators in California? Will it pass smog. Yeah our emission laws suck same with the gun laws. __________________

10-02-2009, 11:12 PM	#12
E55Bullet Member Join Date: Apr 2009 Location: Lafayette, IN Posts: 183 Drives: 2006 E55	my .40 fits nicely in the door =) __________________ -Rear Cat Delete -Res. Delete -172mm LET Pulley -Eurocharged Heat Exchanger -Eurocharged Custom Tune -CM90 Johnson Pump - -10 thermostat mod -S55 Driver's Side intake tube -K&N's -5% Tint 35% windshield -Mandrus Millenium Wheels -Nitto 555R's 285/35/18 -Front and Rear EBC Yellow Stuff Pads "It's more like a Hammer, a bit clumsy, but it will still kill you."

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10-02-2009, 01:08 PM	#3
nanayaw6 Newbie Join Date: Mar 2009 Location: Alpharetta Georgia Posts: 13 Drives: 2006 E55	How much power is gained from this mod and dou you by chance have a sound/video clip?

10-02-2009, 02:42 PM	#4
gsw1 Newbie Join Date: Sep 2009 Posts: 1 Drives: 2009 ML 63	www.fabspeed.com

10-02-2009, 03:17 PM	#5
bigswin Member Join Date: Sep 2009 Posts: 113 Drives: 2004 E55 AMG	I just had my secondary cats and resonator removed on Monday. I honestly don't feel any difference but the sound is a vast improvement. Definitely more growl coming out the back but still quiet inside the cabin. I decided against the x and h pipes and ran 3" straight pipes. I was beating my buddy with a stock E55 at the track on Tuesday so I'm not worried about "losing" anything.

10-02-2009, 04:22 PM	#6
jikjak MBWorld Fanatic! Join Date: Sep 2004 Posts: 1,444 Drives: CLS55 AMG	im just wondering why the x pipe should be closer to the headers. does it really make more tq if they are closer to the front? im running a catless system and my xpipe is near the back, in place of the resonators. is there anything wrong with having it that way?

10-02-2009, 06:07 PM	#7
Ohbev Member Join Date: Dec 2008 Posts: 197 Drives: E55 AMG Kompressor	What about if i just cut off the 2 cats and fit 2 pipes in there places and leave the stock H pipe ? will that work fine ?

10-02-2009, 09:49 PM	#11
bigswin Member Join Date: Sep 2009 Posts: 113 Drives: 2004 E55 AMG	Indiana is super chill. I have no requirement for smog tests and I've got a .45 under the seat.

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