We propose an alternative to the introduction of an extra gauge (custodial)
symmetry to suppress the contribution of KK modes to the T parameter in warped
theories of electroweak breaking. The mechanism is based on a general class of
warped 5D metrics and a Higgs propagating in the bulk. The metrics are nearly
AdS in the UV region but depart from AdS in the IR region, towards where KK
fluctuations are mainly localized, and have a singularity outside the slice
between the UV and IR branes. This gravitational background is generated by a
bulk stabilizing scalar field which triggers a natural solution to the
hierarchy problem. Depending on the model parameters, gauge-boson KK modes can
be consistent with present bounds on EWPT for m > 1 TeV at 95% CL. The model
contains a light Higgs mode which unitarizes the four-dimensional theory. The
reduction in the precision observables can be traced back to a large wave
function renormalization for this mode.Comment: 15 pages, 3 figure
