hey guys ive done my researchd and still confused about this MD spacer, mrev, mrev2 thing.... i drive an 04c 6mt (bone stock)....i wantd mrev2 + 5/16 (iso copper)spacer for my first mod....but i heard i'll be runnin lean and need it to be re-tuned....i kno the 05+ with these mods are ok.
maybe i should just stick to the 5/16

wat do u guys suggest?

 

Get the test pipes, instead of the MREV2 and you'll be just fine. And also, you should get the Skunk2 spacer, because it's 5/8, not 5/16.

 

just get the spacer if you don't want to tune it

 

Since you have a '04 6MT, you have the original MREV already. Essentially, the original MREV was a non RevUp lower collector. Tony initially package the said with a plenum spacer. Since the the MREV, the MREV+ and the current MREV2 have made their appearance. The differences between the 3 are more aggressive machining at key points.

If tuning is not an option, which you would like, simply go with a MD spacer of your choice.