PORSCHE has announced details of its upcoming 718 Boxster GTS and 718 Cayman GTS ahead of their first public appearance at November’s LA motor show, revealing a power boost to 269kW for both as well as a long list of chassis, electronic and cosmetic changes.

Due to arrive in Australia in March next year retailing at $173,100 for the Cayman GTS manual and $175,900 for the Boxster GTS manual, the pair of high-output models can both zip from zero to 100km/h in 4.1 seconds when equipped with the 7-speed PDK automatic (a $5980 option).

A revised inlet plenum and turbo stuffs more air into the 2.5-litre flat four, bringing up its peak power 12kW and lifting maximum torque to a V8-like 430Nm. Compared to the last, naturally-aspirated Boxster and Cayman GTS, the boosted four-cylinder makes a sizable 26kW more peak power and an even more significant 80Nm increase in maximum twist.

GTS badging, a red-faced tachometer and Alcantara-clad seats, steering wheel and armrests impart a sportier aura to the cabin, while Porsche’s Track Precision app allows driver’s to capture and analyse driving data during track days – or spirited weekend fangs.

From the outside, more aggressive body plastics, black lamp internals, black tailpipes and reshaped rear diffuser mark the GTS out from vanilla-spec Caymans and Boxsters.