so 1/2"spacer will yield the highest gains on a AEM cai, Stillen cat back empty cats, or should I go to the 5/16"?? 6mt

 

look at dyno sheets and then make the choice or call Tony

 

yeah

 

guys help! I'm trying to understand what MREV is and how you can add it.
Pardon me, I've only owned my 04 for a month. Just need a solid explanation.
My 04 is a 5AT, when upgrading what should I get... MREV (2??) or a spacer? Both?

 

Bro, I've been here about the same amount of time as you, but you'll notice that I have about 90 less posts than you. Why? Because I used the search button and I research. They already gave you an answer, but I guess you're not reading it.

 

^^^What he said...This is a common mod...Use the search button and you will get all the answers and then some more...Lots of threads about this mod...Including dynos and reviews...

 

your car doesn't have a rev-up motor so you would be better of just sticking with just a spacer (motordyne iso 5/16 IMO copper depending on climate where u live). the MREV is mostly for rev-up motors and the non rev-ups dont see too much of a gain for the $ and usually run lean. hope this helped