Yall think that it would effect the way my 2.9L runs if I remove the two cats and keep the flowmaster 2 chamber.
I'm sure it would sound good but im worried about lack of back pressure.
Oh yah, its no where near street legal anyways.
Back pressure
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Re: Back pressure
texastud1983 wrote:Yall think that it would effect the way my 2.9L runs if I remove the two cats and keep the flowmaster 2 chamber.
I'm sure it would sound good but im worried about lack of back pressure.
Oh yah, its no where near street legal anyways.
might loose a little torque but not much. check out ebay they sell what they call "test pipes" to remove the cats
heres a link
http://cgi.ebay.com/ebaymotors/CONVERTE ... 0257820034
says improves performance,,???? don't know but you can email or call them to get the answers your after
87 bronco II 93 5.0 HO, NP435, 44 sas
Re: Back pressure
I removed the cat on my 2.9L, just had the muffler shop make up a two into one pipe, thing worked well pulled good in 2nd gear. I also just had a cherry bomb for a muffler,you could hear me comming!



'87 bII d44,9",np435/205and a 302 ( on hold)
'73 vw bug
'70 vw camper van
'98 jeep tj
2010 ranger
'56 international s110
'73 vw bug
'70 vw camper van
'98 jeep tj
2010 ranger
'56 international s110
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Re: Back pressure
cherry bomb with a 6cylclem wrote:I removed the cat on my 2.9L, just had the muffler shop make up a two into one pipe, thing worked well pulled good in 2nd gear. I also just had a cherry bomb for a muffler,you could hear me comming!![]()

down this way id call you a red neck, not sure what ya call it up there

87 bronco II 93 5.0 HO, NP435, 44 sas
Re: Back pressure
Red neck, just the same. Though it's hard to keep it red through the winter! I spend a fortune on tanning beds.



'87 bII d44,9",np435/205and a 302 ( on hold)
'73 vw bug
'70 vw camper van
'98 jeep tj
2010 ranger
'56 international s110
'73 vw bug
'70 vw camper van
'98 jeep tj
2010 ranger
'56 international s110
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- Posts: 268
- Joined: Thu Mar 20, 2008 4:04 am
- Location: CENTREVILLE, VA
Re: Back pressure
clem wrote:Red neck, just the same. Though it's hard to keep it red through the winter! I spend a fortune on tanning beds.![]()
allot cheaper putting your head under one of those red lamps at mc donalds !!
87 bronco II 93 5.0 HO, NP435, 44 sas
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- Posts: 59
- Joined: Sun Sep 17, 2006 10:40 am
- Location: new caney, texas
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Re: Back pressure
Yah I got it all planned out. Gonna hallo out the first cat because its a two into one then gonna weld my muffler to that. I'm wanting to and an X-member so I can make a trac bar to get rig of my will hop when im in the sand. I got a 9" with full spool, 5.38, disk brakes and stock BII 6" leaf moved about 6 inchs back.