If I got the headers and the offroad y pipe could I install them and my truck run ok for a month or two till I could get a custom tune? The tune is goin to be by blackbear performance I just havent decided wether or not I want to do the headers or not!

 

Yes, they will run fine, but you won't get the max performance out of them until tuned. I'd recommend a wheatley tune unless that is a reputible tuner and you can get it at a good deal.

 

Blackbear is supposed to be really good...He is a sponsor on GMFS.com (my home) Alot of ppl on there have used him (justin_ss or sumthin like that) I havent heard a single complaint yet! I think it is gunna cost me like 250 for a tune and computer and I will be keeping my factory one just in case I need it one day!

 

I'm running on pacesetters, ORY, and no tune and the only problem I have is that damned SES light.

 

same here. pulls alot better but i have the damn engine light on.

 

if you can weld in some extra bungs for the rear 02's then you won't have to worry about the engine light (most likely).

 

Nope, it will still throw a code because the rear O2's measure catalyst efficiency, and well theres no catalysts. so basically its gonna throw a code either way

 

it won't if they're placed further back. at least mine didn't throw a code for the B1S2 even though there wasn't a cat in front of it. B2S2 threw a code since it wasn't plugged in lol. anyways, just get a tune so it'll be fixed. disabling COT helped out my mileage too actually
jake