Fox X pipe question

MrPerfect2

5 Year Member

Jul 23, 2019

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Washington DC

Oct 1, 2019

#1

• Oct 1, 2019

• #1

I would like to get a bit more sound out of my 91 - I have a BBK X pipe for long tubes - was thinking to cut my orig back 2 cats off and weld this on - it has air tube inlet but no O2 sensor holes - will car run ok if these sensors are removed ? Or should I just cut the back cats off and keep orig piping and just use less of the X pipe?

 

RaggedGT

Been here over a DECADE and still no CT

Mod Dude

Jul 20, 2014

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Taylorsville ky

Oct 1, 2019

#2

• Oct 1, 2019

• #2

If you are welding the X pipe in, spend a few bucks at the parts house first on a couple O2 bungs and weld them into the x pipe- you really don’t wanna ditch your O2 sensors

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,160

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Massachusetts

Oct 1, 2019

#3

• Oct 1, 2019

• #3

If you want more sound, just cut the two front cats off and weld in straight piping there. Keep the o2 bungs though.

 

Olivethefet

I will own your nuts! LOL

5 Year Member

May 17, 2018

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Enterprise AL

Oct 1, 2019

#4

• Oct 1, 2019

• #4

My car doesn't have cats. Sounds alright and has the O2 sensors. I would not recommend removing the O2 sensors. With no cats on the car it does smell heavily of gas. Not a big deal rolling down the road, but sitting at stop lights with the windows down can be a bit smelly.

 

MrPerfect2

5 Year Member

Jul 23, 2019

308

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48

Washington DC

Oct 3, 2019

#5

• Oct 3, 2019

• #5

Cut off old H pipe area and got the X fully welded on the car - old pipe had rusted holes and a broken hanger ( causing it to bounce ) there were no o2 sensors in this area , just the air tube ( hook that up too ) car sounds a bit quieter but lower rumble tone ( I like it ! ) probably was higher noise from the rust holes - $100 labor well spent !

 

General karthief

wonder how much it would cost to ship you a pair

Mod Dude

Aug 25, 2016

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polk county florida

Oct 3, 2019

#6

• Oct 3, 2019

• #6

No 02's?

 

MrPerfect2

5 Year Member

Jul 23, 2019

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Washington DC

Oct 3, 2019

#7

• Oct 3, 2019

• #7

Nope - must be o2s only on front cats area

 

General karthief

wonder how much it would cost to ship you a pair

Mod Dude

Aug 25, 2016

27,827

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polk county florida

Oct 3, 2019

#8

• Oct 3, 2019

• #8

Why no 02's?

 

Olivethefet

I will own your nuts! LOL

5 Year Member

May 17, 2018

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Enterprise AL

Oct 3, 2019

#9

• Oct 3, 2019

• #9

There are O2s on it right? I'm guessing they are further up on the exhaust and just not in the pic?

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,160

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Oct 3, 2019

#10

• Oct 3, 2019

• #10

The O2s are mounted up ahead of where the pre-cats would be. First couple inches of the H-pipe. There are no rear o2's on a fox.

 

MrPerfect2

5 Year Member

Jul 23, 2019

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Washington DC

Oct 4, 2019

#11

• Oct 4, 2019

• #11

From what I read from people who cut both front and rear cats off and looked inside them - they look like the same honeycomb - they said these are 4 cat systems - btw I sold back 2 cats for $80 scrap guy ( I had no idea they are valuable )

 

MrPerfect2

5 Year Member

Jul 23, 2019

308

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48

Washington DC

Oct 4, 2019

#12

• Oct 4, 2019

• #12

Tucked the LX pipes under bumper

 

Reactions: General karthief

MrPerfect2

5 Year Member

Jul 23, 2019

308

54

48

Washington DC

Oct 9, 2019

#13

• Oct 9, 2019

• #13

The more I drive the car with X pipe , the more I like it ! Feels like a power boost when rpms hit 2500 - sound is not much different ( maybe a bit louder , but same rumble ) I have no idea what mufflers are on it , lol -

 

D

Deleted member 215073

Oct 9, 2019

#14

• Oct 9, 2019

• #14

Aren't those heat shields supposed to be facing up?

 

MrPerfect2

5 Year Member

Jul 23, 2019

308

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48

Washington DC

Oct 9, 2019

#15

• Oct 9, 2019

• #15

Might have heat plates on otherside also ?