I just got my MBH downpipe from a forum member here that has both the straight or 200 cell catted sections on the downpipe. I will be getting the Renntech tune later in the month but was hoping to get the cats on this weekend....so was wondering if anyone has done this with throwing a check engine light? Thanks in advance!

 

Any suggestions??

 

without a tune, what are u gonnna get a few HP, change in sounds??

 

Yup...I have some free time this weekend so I'm more like a kid in a candy store ready to wrench on it or wait till I get the renntech retuned ECU / filters / plugs...plus I have a local car and coffee meet this weekend so it would be sweet to drive up the new downpipe on the wagon.