Air Flow Research 265CC Oval Port Cylinder Head 109CC Chamber Partial CNC-Ported Pair Big Block Chevrolet Engine

Boost your Big Block Chevrolet Engine’s performance with a Pair of Air Flow Research Partial CNC-Ported 265CC Oval Port Cylinder Heads! These heads are built to improve your ride’s airflow through the use of partial CNC-ported intake, exhaust, and combustion chambers. The A356 aluminum castings are matched with other high-quality components to ensure a lightweight construction that handles heat with ease. These heads are compatible with engines that operate up to 6200 RPM. They can also handle engines with displacements up to 468 cubic inches.

Specifications:
- Material: A356 Aluminum
- Intake Port Volume: 265CC
- Intake Port Dimension: 2.030"H x 1.830"W x1/2 Radius
- Intake Port Location: Stock
- Exhaust Port Volume: 132CC
- Exhaust Port Dimension: 1.770"H x 2.010" W
- Exhaust Port Location: .375" Raised
- Combustion Chamber Size: 109CC
- Valve Cover Bolt Pattern: Perimeter Bolt
- Valve Angle: 24°/4° Int, 15°/4° Exh
- Valve Spring Pocket Diameter: 1.725" O.D
- Max Valve Spring Pocket Machining: 1.750" O.D
- Deck Thickness: .750"
- Minimum Bore Diameter: 4.125"

Attention: These heads are illegal to operate on any public highway. This includes 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.