Header/Cat delete - first mod - info me

[Turbowned]

I was all gung-ho about wanting to install headers until I found that the primary cat resides there. I'll have to wait and see if a company develops headers either utilizing a cat or places the cat after the headers and offers some sort of tuning solution. Generally speaking, the closer to the engine the primary cat is, the cleaner the emissions. I'd hate to buy some poorly-conceived headers and promptly fail emissions testing.

Not to mention, if this is how the stock headers really are constructed, I don't see them getting much more efficient than they already appear to be:

[Dave-ROR]

Originally Posted by ahausheer

Why cat delete? High flow cats don't rob horsepower at the level of this car.

I run high flow cats as well (although the one in my ITR has failed and spit the catalyst out) but test pipes are much cheaper. That's why many run them instead.. it's why I ran one on the S2000. I forget what I paid but I think it was 35-50 shipped in a group buy vs 150-200..

[SkullWorks]

yeah on a track car Test pipe is fine, but on a street car it just makes your bumper look shitty and is a huge tip off to cops (i live in CA) that you are not legit.

[Scooby South]

How about ...This..

Originally Posted by garagedefeat

[Dimman]

^ Primaries look kind of short, but very nice.

What is this for? NA EJ or is this an FA prototype?

[kmbkk]

That header looks sexxxxy!

[Scooby South]

Originally Posted by Dimman

^ Primaries look kind of short, but very nice.

What is this for? NA EJ or is this an FA prototype?

FA Prototype..I can't use it..I need a cat for the class I run in..

But it IS sexy..for sure

Bill

[cossey]

They connect the wrong primaries together. It should be front pair and back pair (like the stock manifold).

It will likely lose power over cutting the cat out of the stock manifold and welding in a straight pipe.

[Dimman]

Originally Posted by cossey

They connect the wrong primaries together. It should be front pair and back pair (like the stock manifold).

It will likely lose power over cutting the cat out of the stock manifold and welding in a straight pipe.

Shit, you're right! Motherf-...

Distracted by good merge collectors, nice welds, slip fits and v-bands, that this was overlooked.

[Scooby South]

wow...didn't even notice that ...

Bill

[MindtheGap]

Yes excellent, let the information flow freely

[Dimman]

Originally Posted by Scooby South

wow...didn't even notice that ...

Bill

He could maybe make some mods to keep the same/similar layout if he goes for a 4-1 design instead of the 4-2-1.

Fab quality is very good, though.

[TPO]

Originally Posted by ichitaka05

Hope you don't buy White FRS/BRZ & install catless

Been there done that

[Turbowned]

I'm just the idiot who wants the headers to be unequal-length enough to hear a little more boxer rumble and less 4cyl growl