AFR 190cc/ 65cc Vortec Street Cylinder Head Pair SBC

Airflow and combustion efficiency are critical in 350-383 cubic inch Small Block Chevy engines. These cylinder heads feature fully CNC-ported intake runners, exhaust runners, and combustion chambers to support strong street performance up to 6,000 RPM. The 190cc intake ports and 65cc chambers provide a balanced combination of velocity and volume for responsive throttle and usable mid-range power.

Cast from A356 aluminum, the cylinder heads reduce weight while effectively dissipating heat. They use a 23-degree valve angle and are machined for both center bolt and perimeter bolt valve covers. These heads are not compatible with self-aligning rocker arms and are intended for dedicated racing vehicles only.

Features and Benefits:
- A356 aluminum construction reduces weight and improves heat dissipation
- 190cc intake runners support 350-383 cubic inch engines
- 65cc combustion chambers balance compression and street drivability
- Fully CNC-ported intake, exhaust, and chambers optimize airflow
- Raised .100" exhaust ports improve flow characteristics
- Machined for center and perimeter bolt valve covers
- 23-degree valve angle maintains Small Block Chevy geometry

Specifications:
- Material: A356 aluminum
- Intake port volume: 190cc
- Intake port dimension: 2.320" H x 1.297" W x 3/8 radius
- Intake port location: stock
- Exhaust port volume: 64cc
- Exhaust port dimension: 1.450" H x 1.550" W
- Exhaust port location: .100” raised
- Combustion chamber size: 65cc
- Valve cover bolt pattern: perimeter bolt
- Valve angle: 23 degrees
- Valve spring pocket diameter: 1.460" OD
- Max valve spring pocket machining: 1.750" OD (warning: do not machine spring pad any deeper.)
- Deck thickness: .750"
- Minimum bore diameter: 4.000"

Vehicle Fitment:
- Fits Small Block Chevy Engines

Please Note: These products are illegal to operate on any public highway. This means any public paved or unpaved roadway or in a public park. These products are only legal if used on a dedicated racing vehicle. Violations are subject to a maximum penalty of $37,500 per violation per vehicle, revocation of registration by DMV, loss of use on public right of ways, and proof of correction of the tampering. These heads are not compatible with self-aligning rocker arms.