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2SS45th · 08-09-2012, 10:30 PM

Alright, the op asked why the tune is required for headers. In short, a tune isn't. But, a tune can unlock 15 horsepower, turn off the CEL, and help manage air fuel trims. A common option is to add LTs, but wait to tune until there are other mods that truly require a tune. With off road extensions, the CEL will definitely turn on. With cats, it can sometimes not throw a CEL. Will having a CEL hurt anything? Nope, but it can impede the vehicle's ability to warn you of another possible problem. IMO, if you plan on further modding within a few months, wait to tune. If this is it for greater than a few months, have it tuned for peace of mind.

08-09-2012, 10:30 PM	#63
2SS45th Drives: 11 Seconds or Faster Join Date: May 2012 Location: Arvada, Colorado Posts: 2,797 View My Garage	Alright, the op asked why the tune is required for headers. In short, a tune isn't. But, a tune can unlock 15 horsepower, turn off the CEL, and help manage air fuel trims. A common option is to add LTs, but wait to tune until there are other mods that truly require a tune. With off road extensions, the CEL will definitely turn on. With cats, it can sometimes not throw a CEL. Will having a CEL hurt anything? Nope, but it can impede the vehicle's ability to warn you of another possible problem. IMO, if you plan on further modding within a few months, wait to tune. If this is it for greater than a few months, have it tuned for peace of mind. __________________ I Ain't About That Stock Life.