K&N Performance Air Filter Set for Mercedes E550 / CLS550 / S550 (4.7L V8 Bi-Turbo)

K&N Performance Air Filters – Pair (Mfg Part # 33-2474) The legendary red K&N drop-in filters trusted by tuned M278 owners for over a decade — instant throttle sharpness and proven horsepower gains with zero hassle. Why K&N Performance Filters Are Perfect for Your M278 ✅ Boosts Horsepower & Acceleration High-flow oiled cotton media delivers measurable gains in throttle response and mid-range power. ✅ Washable & Reusable Clean and re-oil every 50,000 miles — backed by K&N’s famous Million Mile Limited Warranty®. ✅ 100% OEM Drop-In Fit Perfect factory seal, works with stock MAF & electronics, CARB legal in all 50 states, will NOT void your warranty. Real-World Results Owners Report Noticeably crisper throttle and stronger mid-range pull Better power delivery on hot days and repeated runs Perfect match for headers, downpipes, tune, E85 or spacers Zero check-engine lights • No tuning required “Put the K&N pair in my E550 last week — throttle is way sharper and it pulls harder through the gears. Exactly what I expected from K&N.” – Alex R., 2015 CLS550 • 512 whp What You Get (Sold as Pair) ✔ 2 × K&N High-Flow Performance Air Filters (Left + Right) – Part # 33-2474 ✔ Pre-oiled and ready to install ✔ Installation instructions Fits These M278 4.7L BiTurbo V8 Models Model Chassis Years E 550 • CLS 550 W212 / C218 2012–2016 S 550 / S 560 • CL 550 W221 • W222 • C216 • C217 • A217 2011–2017 SL 550 R231 2013–2020 GL / GLS 450 • 550 • ML / GLE 550 X166 • W166 2012–2019 OE Cross Reference: 2780940004 • 278094000495 • 278094000490 • Always confirm M278 engine code Drop-in install in under 5 minutes • No tools needed • Fully reversible 🔥 Add Pair to Cart – Ships Same Day BenzUnited Parts • Mercedes Performance Specialist • Burbank, CA