K and N's and smooth tubes a waste of money ?
Wondering if anyone has done before and after testing / rw dyno of a stock vehicle with K and N's, smooth tubes done.
Past experiences I've had, bolt on's were a waste of money unless internals are done.
Exhaust is a definite, knowing I'm pissing the money away as the power gains will be minimal at best, but need the sound.
Wasn't sure if the K and N's and smooth tubes were just a waste of a few hundred bucks.