My previous LS1 and my new VQ37VHR are both a little noisy, and both became even moreso with aftermarket intakes that get rid of the factory sound baffling. You're probably hearing 'normal' valvetrain noise. Slight ticking/clicking, frequency changes with engine RPMs. Normally don't notice it driving, but you'll hear it in a garage or drive-through because it echoes off the nearby wall back into your window.
|