After market cat-back exhausts...
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After market cat-back exhausts...
My mugen twin loop exhaust has a bottle neck right after the cat flange. My question is which aftermarket exhausts don't have this? Does the JDM mugen cat-back have this bottle neck as well?
Why in the world would they keep this bottle neck there on an aftermarket exhaust?
Thanks.
Why in the world would they keep this bottle neck there on an aftermarket exhaust?
Thanks.
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Re: After market cat-back exhausts... (Tommy_Gunns)
The tubing also drops in size from 60mm after its first pass through the muffler. I think it drops down to 55mm. But I'm not positive you should measure it there also.
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Re: After market cat-back exhausts... (Tommy_Gunns)
My question is which aftermarket exhausts don't have this?
Why in the world would they keep this bottle neck there on an aftermarket exhaust?
Will
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Re: After market cat-back exhausts... (Willard)
Will,
I don't think that is why. It looks like somebody put a venturi there, it goes down to about 1.6". On the stock exhaust, I would assume they put that bottleneck there to keep the gases in the cat a little longer for emissions.
I don't think that is why. It looks like somebody put a venturi there, it goes down to about 1.6". On the stock exhaust, I would assume they put that bottleneck there to keep the gases in the cat a little longer for emissions.
To match the opening on the outlet of the stock catalytic converter.
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