KDD ICON Series Street Port Cylinder Heads – 6.0

The Next Evolution in Powerstroke Cylinder Heads

The KDD ICON Series is not just an upgrade—it’s a ground-up redesign. Using state-of-the-art casting technology and modern port geometry, ICON heads deliver airflow, swirl, and durability that factory and ported heads simply can’t match. Designed, cast, machined, and assembled entirely in the USA, these heads set the benchmark for 6.0 and 6.4 Powerstroke performance.

Key Features

🇺🇸 100% Made in the USA – Designed, cast, CNC-machined, and hand-assembled in North Carolina.
24% More Airflow – Outflows stock heads by nearly a quarter.
82% More Cylinder Swirl – Compared to CNC-ported factory-style heads.
Modern High-Velocity Swirl Port Technology – Similar to what’s used in the 6.7 Powerstroke, Duramax, and 24V Cummins.
Dual-Layer Water Jackets – Eliminates hot spots, improves cooling.
Structural Reinforcements – Gussets and ribbing evenly distribute clamping loads.
O-Ringed Decks – Built-in stainless O-ring design virtually eliminates head gasket failures.
Hardened Seats & Guides – Long-lasting durability under extreme use.
25% Thicker Deck Surface – Increased rigidity for superior sealing.
Aluminum Construction – 75+ lbs lighter per pair than factory iron heads, with better heat dissipation.
Ready to Install – Ships fully assembled with valves, springs, retainers, and seals.

Why Swirl Matters

Flow numbers don’t tell the whole story. Traditional porting increases airflow but sacrifices swirl—the critical mixture motion in a diesel cylinder. Without swirl, fuel can’t fully mix with oxygen, leading to unburnt fuel, higher EGTs, more soot, and less power.

KDD’s ICON Series changes the game:

Maintains high airflow and optimal swirl.
Ensures every droplet of fuel meets oxygen for a more complete burn.
Delivers more power, quicker turbo spool, lower EGTs, and sharper throttle response.

Engineering Backed by Testing

KDD didn’t just rely on flow benches—they used CFD (Computer Fluid Dynamics) to simulate real-world conditions:

60 PSI intake manifold pressure
150°F intake air temp
4,000 RPM with S2 camshaft valve timing

The result? ICON heads delivered 7% more in-cylinder air mass than ported factory heads—while improving swirl. No other aftermarket diesel head has seen this level of design and validation.

Results That Matter

Stock heads: ~160 CFM peak flow
ICON Street Port heads: 200+ CFM with improved swirl
ICON CNC Race Port heads: 240+ CFM and 22% more in-cylinder air mass (for maximum performance builds, lead time applies)

In Summary

✅ Stronger than stock.
✅ Proven with modern engineering.

The KDD ICON Series Street Port Cylinder Heads are the only aftermarket aluminum cylinder heads for the 6.0/6.4 Powerstroke, and the only ones fully made in the USA. From daily driving and heavy towing to high-performance street builds, they deliver unmatched reliability and performance.

6.0 Cylinder Heads

KDD 6.0 Powerstroke O-Ring Cylinder Heads, Pair

6.0 Powerstroke Motorcraft OE Stand Pipe - Dummy Plug Kit

ICON Series Aluminum O-Ringed 6.0 Cylinder Heads - Street Port