Quote:
Originally Posted by gtengr
It's relevant. You just don't see it. Have fun believing an AT with an intake tract swap would pollute more than a BMW M4.
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It really has nothing to do with how much pollution it produces. The point is it would change, hell it may even produce less emissions (than the AT with old in/ex manifolds). But it would need to be retested which cost money. The OP was asking why the AT didn't get the red manifold. No one really knows for sure but it seems logical that they didn't want to make changes that would cause them to need to recertify for a 25% market share.
Not really even sure what you are arguing about. Something other than the original topic I guess.