Mil.Spec put me on the podium...

 

Will this cat pass Cali emission tests ? Am considering one, if they do.

 

OE cat is 400 cell and is much longer. I doubt this tiny low density cat will pass.

 

i just went from a perrin 100 cell hfc to a invidia test pipe.

i feel like i lost some tq down low but gain a bit up top?!

 

im pretty sure it wont pass your visual test, but with no SES light thrown, it should pass the OBD test, if you guys do that

 

Passing emissions is contingent on so many things. Is the MIL.SPEC 100 cell street legal? No. Are most mods to Evo's legal? In Cali, no.

That being said, passing emissions is a product of your mods. Really aggressive cams will make that job harder. Having a leaner tune will help. I have heard of some guys running E85 that passed the sniffer test with a test pipe. So there is no cut and dry answer to that question.

 

A cat is not a very difficult part to swap out. Not condoning any sort of emissions fraud - just stating a fact.

 

I have to thank the guys at MIL SPEC for a great product. I took my AMS TBE with test pipe and welded in one of those 100 cell cats. I did not notice and difference in power,slightly less noise from tail pipe,and I mean slightly. What I did notice is that when you are behind the car with it idling you can tell for sure that there is a catalytic converter on it as you can breathe without having your eyes water. I even went one step further and welded the stock cat converter heat shields over it so that it will pass visual inspection as well. I have emissions testing coming up at the end of the month so I will report back how well it did but I am sure that it will pass. Thanks again MIL Spec.

 

What are these catalytic converters rated at (hp wise) ?

 

They are good for at least 500 horsepower. 600 begins to push the limits of the cores, based upon what I've seen.


Link here for thos of you interested in purchasing:


https://www.evolutionm.net/forums/ev...available.html

 

Seems like a dual (parallel) cat set-up is the way to go for high HP cars.

 

Possibly. 600+ hp is a lot of pressure for any cat to handle. Splitting that duty to two cats sounds like a good idea.

 

That is what the BMWs and Porsches do...would seem to make sense with the evo, except for space constraints...

 

Well, you could always run a small muffler and then run a dual-cat set-up near the back of the car. There would be space there where the muffler used to be.

 

so? did it pass?