The factory M177 cylinder heads flow well enough for stock power — but they leave significant airflow on the table once you push past Stage 2. YPG Motorsport M177 Ported Heads are 5-axis CNC ported to race specification, delivering measurably higher intake and exhaust flow across the entire lift range. The same head work used in our world-record W205 C63 program that ran 9.97s at 828 WHP.
No core exchange required — these ship as a complete pair ready to bolt on. Free worldwide shipping included.
What's Included
- 5-Axis CNC Ported Intake Ports — precision-machined for maximum airflow volume and velocity. Not hand-ported — repeatable, consistent results across both heads.
- 5-Axis CNC Ported Exhaust Ports — optimized for scavenging efficiency and reduced backpressure at high RPM.
- Five-Angle Valve Job — competition valve seat geometry for improved flow at low lift and better sealing under high cylinder pressure.
- New OEM Valve Seals — factory-spec seals replaced throughout to eliminate oil consumption issues.
- Combustion Chamber Unshrouding — subtle chamber work to improve flame travel and reduce hot spots under boost.
Performance Gains
- 15-25% increase in intake port flow — measured on a SuperFlow SF-600 flow bench at 28" H₂O test pressure across 0.100"–0.500" lift range.
- Improved exhaust scavenging — reduced reversion and backpressure, critical for twin-turbo hot-vee applications.
- Better spool characteristics — improved exhaust flow feeds the turbos faster, reducing lag on Stage 3 and Stage 4 turbo builds.
- Higher RPM ceiling — airflow no longer the bottleneck past 7,000 RPM, enabling the engine to pull harder through the top of the rev range.
When Do You Need Ported Heads?
| Build Stage | Power Level | Ported Heads Required? | Notes |
|---|---|---|---|
| Stage 1 (ECU Only) | 530–650 HP | No | Stock heads flow enough for Stage 1 calibration |
| Stage 2 (ECU + Downpipes) | 600–700 HP | No | Still within factory head capability |
| Stage 3 (Hybrid Turbos) | 750–850 HP | Recommended | Ported heads unlock the full potential of hybrid turbos |
| Stage 4 (Full-Billet Turbos) | 900–1,500+ HP | Mandatory | Stock heads are the airflow bottleneck at this power level |
Compatible Vehicles
- Mercedes-AMG C63 / C63 S — W205 (2015–2021)
- Mercedes-AMG E63 / E63 S — W213 (2017+)
- Mercedes-AMG GT63 / GT63 S — X290 / C192
- Mercedes-AMG GLC63 / GLC63 S — X253 (2018+)
- Mercedes-AMG GLE63 — W167 (2020+)
- Mercedes-AMG GLS63 — X167 (2020+)
- Mercedes-AMG G63 — W463A (2019+)
- Mercedes-AMG S63 — W222 / W223
Fits all M177 cross-plane crank applications. For the M178 flat-plane crank variant (AMG GT/GTS/GTR/GT R Pro/GT Black Series), see M178 Ported Heads.
Why YPG?
YPG Motorsport set the world record for the first sub-10-second Mercedes-AMG C63 W205 quarter mile — 9.97s at 828 WHP. That engine used the same CNC porting specification available in this product. We don't outsource head work — every set is ported to our exact flow targets, measured and verified before shipping. 15+ years of AMG engine expertise, from daily-driven Stage 1 cars to 1,500HP race builds.
Pair With
- M177 Crate Engine — 1,500HP+ Forged Build — complete long block with forged internals + ported heads included
- M177 Short Block — 1,500HP+ Forged Build — forged bottom end to match the head flow
- M177 Forged Internals — Rods & Pistons Kit — world record spec CP-Carrillo assembly
- Stage 4 Turbo Upgrade — M177/M178 — 1,500HP+ billet turbos
- Stage 3 Turbo Upgrade — M177 — ball-bearing hybrid turbos
- W205 C63 Catless Downpipes
- W213 E63 Catless Downpipes
- Eventuri M177 Cold Air Intake
Build Process & Delivery
- Build time: 1–2 weeks from order
- Shipping: Free worldwide — USA, UK, Europe, Australia, Middle East
- Core exchange: Not required
- Support: WhatsApp direct for GCC customers. Email support worldwide.
Price: $6,500 — Free worldwide shipping. Contact YPG Motorsport via WhatsApp for build consultation.
Frequently Asked Questions
How much do M177 ported heads cost?
YPG Motorsport M177 Ported Heads are $6,500 per pair with free worldwide shipping. No core exchange required.
What is the difference between M177 and M178 ported heads?
The M177 uses a cross-plane crankshaft and wet-sump oiling — found in the C63, E63, GLC63, G63, and GT63. The M178 uses a flat-plane crankshaft and dry-sump oiling — found in the AMG GT, GTS, GTR, and GT Black Series. The cylinder heads have different port geometry and combustion chamber design. They are not interchangeable.
Do I need ported heads for a Stage 2 tune?
No. Stage 1 and Stage 2 builds run well on factory heads. Ported heads become recommended at Stage 3 (hybrid turbo) power levels and are mandatory for Stage 4 (full-billet turbo) builds above 900 HP where the stock heads become the airflow bottleneck.
Are these hand-ported or CNC-ported?
5-axis CNC ported. Unlike hand porting, CNC porting ensures perfectly repeatable results — both heads flow identically, which is critical for cylinder-to-cylinder consistency on turbocharged engines running high boost.
Can I install ported heads on a stock bottom end?
Yes. Ported heads bolt directly onto the factory M177 block with no modifications. However, if you're porting the heads to support Stage 3 or Stage 4 power levels, forged internals are strongly recommended to match the increased airflow and cylinder pressure capability.
Do you ship worldwide?
Yes. YPG Motorsport ships all engine components worldwide for free — USA, UK, Europe, Australia, Middle East, and beyond.
