well my stock manifold has cracked and I am very angry. So my solution is as follows. I plan on using a dx manifold along with the cat. My question is has anyone done this? Any adverse effects on it? I know I am going to have to extend my o2 sensor harness ( no big deal). But will it affect mpg ? I dont see why but just checking before I make a mess. Thanks

 

How bad of a crack? Cant you just run a quick bead over it to hold it for a while.

I dont think youll feel any downgrade to the dx manifold maybe a little more back pressure but nothing that will hurt you (unless you have a clogged cat.)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Luserkid &raquo;</TD></TR><TR><TD CLASS="quote">How bad of a crack? Cant you just run a quick bead over it to hold it for a while.

I dont think youll feel any downgrade to the dx manifold maybe a little more back pressure but nothing that will hurt you (unless you have a clogged cat.) </TD></TR></TABLE>

Well I recently did a smog check and the cat is almost done... So instead of trying to replace that utterly expensive cat I thought it would be easier to go with the bottom bolted cat and purchase one of those. Considerably cheaper and I have never had any cracking issues with those manifolds before... As for welding it . Sure it could be welded but I dont think that cat is very good anymore.

 

Better check with a smog ref beforehand to make sure it is CA-legal to swap out the close-coupled cat.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Targa250R &raquo;</TD></TR><TR><TD CLASS="quote">Better check with a smog ref beforehand to make sure it is CA-legal to swap out the close-coupled cat.</TD></TR></TABLE>

Thats true also...

 

any other insight?

 

put a DX or EX/Si header on it, and a DX or EX/Si Cat.

 

what where you doing? to much nitrous?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zacatkings &raquo;</TD></TR><TR><TD CLASS="quote">
what where you doing? to much nitrous? </TD></TR></TABLE>

LOL...NO. I was checking everything and noticed an exhaust leak

 

the location of the O2 sensor may cause issues. The P07 is setup so it's expecting the O2 to sit close to the engine, further away and you'll run richer which may be enough to cause problems.

I have a VX exhaust mani sitting here if you need one that isn't cracked.

 

the ex manifold wont pass visual. i have an hx and had to bite the bullet. $180

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xbabysharkx &raquo;</TD></TR><TR><TD CLASS="quote">the ex manifold wont pass visual. i have an hx and had to bite the bullet. $180 </TD></TR></TABLE>
thats without the cat though.... I may need a cat soon