uhhhh then why would it say in the ad that it suits corollas too??

 

They probably do suit a FWD corolla but these guys are after RWD manifold/extractors.

really when it all comes to the crunch, the two inches isn't going to hurt that much, especially if your going interferance type (4-2-1), the diference is going to be negligable.

 

4 into 1 is where the equal tuned length really counts. don't get me wrong, the equal length is good but not a problem until you go 4-1, as there the shizniz and are the better ones to have.

 

just my 2c.

I use a set of the TRD copies, they come on about 5000rpm. I used to have a set of 4-2-1, and they come on much lower. I don't think there would be much power difference between them.