Stock Header Question
 

Can you replace the primary cat in the stock header? I ask because I plan on getting a tune, and I think leaning out the AFR will shorten the life span of the primary cat. Just wanting to make sure I can change it down the line if need be.

i believe the first cat is a part of the manifold.

That's what I was afraid of. My gen 2 MR2 was the same. When the primary cat went out it was big money to replace.....

Should replace the header if you intend on tuning the car. No reason to run something more restrictive.

I agree. But I am not happy with the header options. The AP is losing power on most dynos. And the JL is way too expensive. Maybe the Borla units will be good performers...

More headers will be showing up to the market. Perrin and Nameless haven't given their final designs yet. Borla is one of the best choices currently due to price and proven performance and a nice UEL design. I'm going to wait and see what Perrin and Nameless do before I jump the gun. The car is still so new that they are still tweaking results and fabricating different designs till they get what they want.

Or just punch it out and carry on as if you were normal.

Even the best options are only picking up 5-6 hp, maybe 8-10. With so many parts looming not too far away, there's plenty of reason to run the stock unit for now.

someone told me borlas use to have poor welds and crack over a short time. on the exhaust systems. im not to quick to invest in there header until miles are put on them from someone

Where have you heard such a thing ? I have friends that have been running borlas for year, no problems

Isolated case that happen many many years ago. Regardless, they took care of the problem quickly as all their parts have 1 million mile warranties. Something you wont get from pretty much any other company...

Have anybody try retaining the stock headers but remove the cat?

good to know