992 Carrera Non-S/S/GTS 3.0L 74mm IPD Plenum ('20-Current)992 Carrera Non S S GTS 3. 0L 74mm IPD Plenum ('20 Current) Part #92274 3. 0 The 992 Carrera engine is another modern marvel from Porsche. Although displacement remains unchanged at 3. 0L, there are a plethora of upgrades that elevate the 9A2 Evo engine head and shoulders above the previous 991. 2 model engine. We were fortunate enough to have unlimited access to a 992 Carrera S during our extensive development and testing program. This unrestricted