I have the same tip, same place, and same style truck (assuming its a short bed standard cab) just different color ha ha what did you do for the check engine light?
im not too sure that this is open headers... open headers would require headers instead of a stock exhaust manifold and for the exhaust to exit before the catalytic converters.
@Dustin91 sorry to burst your bubble but that 295hp is at the fly wheel. A stock 4.8 runs at about 215-220ish maybe a little more at the rear wheels.