Do I NEED a tune?
If you dont it will not damage anything.
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did you pull your cats off after the install *****? The Best V8 Stories One Small Block at Time
also the cats and stock y pipe were the first things i took off to install the headers cuz it would be impossible to leave them anywhere close to their stock location with lt's. . .duh
, tune after Heads/Cam unless you plan on never installing these things, then sure, get one, it will help gain some horses and the engine will thank you. 






and had a custom ory welded in. . . car runs fine without the rear o2's