[arpad_m]

Originally Posted by GreyGhost702

"Ticking" is generally normal from LTH's. As Josh pointed out, the thin wall material transmits sound more readily than the OE style manifolds, which are much thicker. I've read that having them jet coated helps reduce under hood noise from the headers. Even high temp header paint. You could also heat wrap them, but I've read wrapping headers can accelerate wear.

I kind of prefer the mechanical sounds from the engine. Particularly noisy lifters (healthy lifters), and of course superchargers/turbos. You could always dull the LTH tick with supercharger hum...

I second (third) that. The noise profile of my LT1 definitely changed with long tube headers, the ticking is much louder than before. With the new forged bottom end, I hear a bit of valve noise underl oad, too, nothing like a sewing machine, just a pleasant little chatter.

The sound my engine emits under boost is not exactly what I'd call "hum", though, it's more of a thunderous roar with a tiny bit of whine.