1991 240 NA Down Pipe EGR vs NON EGR

Does anyone know if there's a difference between EGR and NON EGR downpipes on a 240, other than the cat flange?

The reason I ask is I made the mistake of buying a magniflow cat from a local performance store prior to looking into the down pipe flange. The magniflow cat has a weld on flange, but the EGR down pipes have a donut flange. My Car unfortunately has EGR, but it looks like the EGR Valve pipe screws into the manifold. Is the EGR manifold taller to compensate for the vavle pipe? Or is it the same height as a NON EGR manifold? Pipe length on the down pipe is my only concern with purchasing a NON EGR down pipe to make my magniflow cat work.

Any help is appreciated.

Same the EGR one just has that port on it to screw the egr pipe into. Any aftermarket cat will usually have to be welded in unless it's made specifically for a 240 to bolt in.

EGR goes into the manifold.

My understanding is that EGR is fatter at the cat connection to it can take a bigger cat to appease California.

-Ryan

Ryan_R said:

EGR goes into the manifold.

My understanding is that EGR is fatter at the cat connection to it can take a bigger cat to appease California.

-Ryan

Click to expand...

I can definitely tell that my existing CA cat is much fatter than the federal magniflow cat I purchased.

Sounds like there isn't a difference in manifold height between non EGR and EGR then. Is that correct?

Just bought non egr downpipe from fcp, downstream connection uses flat gasket, not a doughnut

jsdevel said:

I can definitely tell that my existing CA cat is much fatter than the federal magniflow cat I purchased.

Sounds like there isn't a difference in manifold height between non EGR and EGR then. Is that correct?

Click to expand...

Correct. The only difference is the port in the back for the EGR tube.

Thanks all for the info! Just got off the phone with ADEQ, and was informed that the only test my 1991 240 has to pass is a tailpipe and dyno test. Visual inspection isn't going to verify whether or not my CAT is CA compliant So it looks like I can use a non EGR downpipe with my non EGR Magniflow CAT