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Discussion Starter #1
So I just got my Invidia Catless DP in but still waiting on my SPT exhaust which I nor the dealership have any idea when it is going to come in. I want to put in my DP bad but if I do that will I need a tune for it? Would it be better to just wait for the SPT to come in and put it all on at once then run a Stage 2 Map? Its sitting in my garage and I want it on haha... Thanks!
 

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Whenever you change the amount of air going in and out of your engine you should get a tune (IMHO of course). I would definitely NOT put on a downpipe without getting some sort of tune or EM unless of course you have an affinity for CELs.
 

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catless DP without a tune is going to throw a CEL or worse give you boost creep or run your engine lean which could blow it up...

get a tune! it's well worth it.
 

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Wait, then get a tune. On a side note: The OTS Stage 2 maps are not meant to run catless unless stated. Normal Stage 2s are catted and if you run these maps with a non catted dp, you might experience severe boost spikes due to the lack of backpressure.
 
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