Just found out the hard way the stock cat does not bolt on to my downpipe. Now I have to put the stock downpipe back.

 

just keep the tuned map and swap the dp and cat out for smog purposes. on 1 time every 2 years right? not too complicated. i passed last year on my previous tune when i had just a cbe and drop in filter on a tuned map.

 

yup, that catback and downpipe just opened you up for a tune bro. people are saying you don't need one should say something more like, 'it's safe to run those mods with no tune'. Catback and downpipe, you 'need' a tune. FPR or not your AFRs will change if you do air flow mods; maybe not a dangerous change but they will change.

And putting cams in your car with no tune is just wasting money. Even mild cams can bring some HP to the table. Think of it as optimization.

 

+1 couldnt have said it any better, a tune will also bring out the true potential of the mods that you have installed also so id recommend it

 

this sucks. can you get a hi-flow cat for cheap?

 

Problem with high flow cats in California is, if the serial numbers are not listed on the BAR website, then it is an automatic fail on the visual inspection.

 

Hmmmmm. Cali is so nice but so **** about emissions.

 

Nevermind, I had a brain fart the other day. I did some adjustments and it fits okay now with the stock cat. No need to install stock downpipe.


After installing the stock cat, Im surprised that the car doesnt stink anymore

 

I love it! I just thought you had a AMS downpipe or another that changed the bolt pattern.

That is one of the characteristics of the cat. GL

 

yeah my car smells rich; wifey and daughter noticed it first