Skunk2 Racing 305-05-0230 Tuner Series Stage-3 Camshaft for Honda K20A2 Engines

Engine Compatibility

The Skunk2 Stage 3 camshaft is designed specifically for Honda K20A2 engines, commonly found in:

• Acura RSX Type-S

• Honda Civic Si

⚠ Designed for the performance-oriented K20A2 cylinder head.
⚠ ECU tuning and valvetrain upgrades are required.

What Stage 3 Camshafts Deliver

Compared to Stage 1 and Stage 2 camshafts, the Stage 3 profile features:

• Increased valve lift

• Longer camshaft duration

• Improved high-RPM airflow

• Aggressive VTEC engagement

These changes help the engine move significantly more air, which is critical for producing horsepower at higher RPM levels.

Stage 3 cams are typically used in engines operating in the 8,000–9,000 RPM range.

Skunk2 Racing’s “Tuner Stage 3” Camshafts are designed as a performance upgrade to mildly to highly modified vehicles running the 3 Lobe VTEC K20A/ K20A2/ K20Z1/ K20Z3 and K24A2 engines or cylinder heads. These camshafts will outperform all other Skunk2 Tuner offerings from idle to redline with no loss in drivability. A great match for vehicles with aftermarket intake manifolds, light to heavy cylinder head work, large changes in compression, intake, big-tube header, and large exhaust. Tuner Stage 3’s require a simple valve spring and retainer upgrade due to the additional lift, duration and increased RPM range. Considered the go to cam for cracking that 300hp on pump gas for years… ideal for street cars that really aren’t street cars and entry-level drag race cars.

Ideal Build Applications

The Skunk2 Stage 3 camshaft is best suited for:

✔ High-compression naturally aspirated K20 builds
✔ Track and road racing setups
✔ Aggressive street/strip builds
✔ Fully built engines targeting maximum horsepower

For builders pushing the limits of the K20 platform, airflow improvements from aggressive cam profiles are essential.

Our Tuner Stage 3’s incorporate Skunk2 Racing’s cutting-edge Fast Ramp and AMAX features, which are responsible for increasing overall performance, producing unmatched response from idle to redline. You can expect optimized mid-range and top-end horsepower/torque with peak power moved up the RPM band, producing a seamless VTEC crossover!

Fast Ramp – The same technology used in Formula One racing, where seat timing is reduced, which results in additional cylinder pressure and more torque but without compromising valve-train longevity.

Recommended Supporting Modifications

Installing Stage 3 cams requires additional upgrades to maintain reliability and unlock full performance:

• Dual valve springs

• Upgraded retainers (steel or titanium)

• Adjustable cam gears

• High-flow intake manifold

• Larger throttle body

• ECU tuning (Hondata K-Pro or standalone system)

Without proper valvetrain upgrades, aggressive cams can lead to valve float at high RPM.

AMAX – A Skunk2 design that simply maximizes the area under the lift curve but without compromising reliability or valve-train stability. Skunk2’s profiles feature more duration than competitors’ at lifts above 1mm, resulting in greater efficiency and more power.

Skunk2 305-05-0230 K20 Stage 3 Camshaft – Expected Performance Gains

When combined with proper tuning and supporting modifications, Stage 3 camshafts can provide:

• Significant top-end horsepower gains

• Improved VTEC powerband transition

• Increased airflow through the cylinder head

• Stronger performance above 7,500 RPM

These cams are commonly used in K20 builds targeting 240–260+ horsepower naturally aspirated.

Independent tests have shown average gains to be in the neighborhood of +30-35 horsepower with large gains in mid-range torque and upper RPM horsepower! Tuner Stage 3 cams are a more picky install and should be performed by a detail minded installer with a attention paid to all critical clearances and degreeing for peak performance.

Features:

• Intake – Lift: 14mm/ Duration 278°
• Exhaust – Lift: 13mm/ Duration 282°
• Intake Centerline – Variable
• Exhaust Centerline – 107°
• Valve Clearance (Intake / Exhaust) – .008” / .010”
• RPM Range: 1,500 – 9,400
• HP Gains: 30-33
• Torque Gains: 24-26
• i-VTEC Settings – Small Lobe 35° Advance/ Big Lobe 40° to 30° Advance
• VTEC Crossover – 5,500 to 6,500 RPM

Notes: Required – Alpha Valve Springs, Alpha Titanium Retainers, and Engine Management.

Installation Notes

Performance camshafts require careful installation to ensure proper engine operation:

• Degree camshafts accurately

• Verify piston-to-valve clearance

• Check valve spring installed height

• Inspect for coil bind

• Perform ECU tuning immediately after installation

Proper setup ensures both reliability and maximum performance.

Fitment:

• 2006 – 2011 Honda Civic (2.0L Si)
• 2002 – 2006 Acura RSX (2.0L Type S)
• 2004 – 2008 Acura TSX (2.4L Base K24A2)

For mild to highly modified Honda K20 / K24 Engines
Fast Ramp & AMAX Technologies
Up to 33 horsepower and 26 lb-ft torque gain
RPM Range: 1,500 – 9,400 / VTEC Crossover – 5,500 to 6,500 RPM
Intake – Lift: 14mm/ Duration 278° / Exhaust – Lift: 13mm/ Duration 282°
Intake Centerline – Variable / Exhaust Centerline – 107°
Valve Clearance (Intake / Exhaust) – .008” / .010”
i-VTEC Settings – Small Lobe 35° Advance/ Big Lobe 40° to 30° Advance
Required – Alpha Valve Springs, Alpha Titanium Retainers, and Engine Management

Why Choose the Skunk2 305-05-0230 K20 Stage 3 Camshaft?

Skunk2 has become a trusted name in Honda performance because their camshafts offer:

• Proven track and dyno results

• Precision-machined cam profiles

• Reliable operation at high RPM

• Compatibility with Skunk2 valvetrain systems

For builders chasing serious power from a K20A2 engine, aggressive camshaft upgrades like the Stage 3 are often a key part of the formula.