SKYACTIV-G 4-2-1 Exhaust ManifoldEHFCVAugust 11, 2013PowertrainMazda Skyactiv-G 4-2-1 exhaust manifold This 4-2-1 exhaust manifold is one of the innovations in the Mazda SKYACTIV G engine that helps make a high compression ratio possible. # ICE Share on Facebook Share on X (Twitter) Share on Pinterest Share on LinkedIn Share on WhatsApp Share on Email Share on Flipboard Previous Post Cylinder Head with Integrated Exhaust Manifold - 3 Cylinder Piston Engine Next Post Anti-Lag System (ALS) Leave a ReplyCancel ReplyYou must be logged in to post a comment.