  We present a procedure for tagging boosted semi-leptonic $t\bar t$ events
based on the Template Overlap Method. We introduce a new formulation of the
template overlap function for leptonically decaying boosted tops and show that
it can be used to compensate for the loss of background rejection due to
reduction of b-tagging efficiency at high $p_T$. A study of asymmetric top pair
production due to higher order effects shows that our approach improves the
resolution of the truth level kinematic distributions. We show that the
hadronic top overlap is weakly susceptible to pileup up to 50 interactions per
bunch crossing, while leptonic overlap remains impervious to pileup to at least
70 interactions. A case study of Randall-Sundrum Kaluza-Klein gluon production
suggests that the new formulation of semi-leptonic template overlap can extend
the projected exclusion of the LHC $\sqrt{s}$ = 8 TeV run to Kaluza-Klein gluon
masses of 2.7 TeV, using the leading order signal cross section.
