Definitely want to get at least Shorty headers and Gut the stock cats
Ripps tune turns off the rear o2 sensors, so no worries on throwing codes.
I ordered my kit way back in May, but waited until I had a replacement transmission on hand before installing the Ripp kit.
I'd hate to be stranded with a broke stock trans, and no I wouldn't trust it to last longer than a month or two,
We are talking +200whp over stock here afterall.
I know a lot of guys that only added 50hp NA are burning up stock transmissions.
Sure you can try to tell yourself you wont use all that power,
dont kid yourself...if it's there you will use it, if not...why bother installing it