ENGINE PRO RACING Chevrolet LS3,L76,L77,L98 Rectangle intake ports, 15 degree OEM head bolt desig
These heads are sold in Pairs
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Detailed Overview of the OE 4 Head Bolt Design
The OE 4 Head Bolt Design is a cutting-edge solution crafted to enhance engine performance through advanced engineering and optimized dimensions. Made from lightweight aluminium, this design features a combustion chamber volume of 68cc and an intake runner volume of 276cc, facilitating superior airflow and combustion efficiency. The intake port dimensions of 2.585" by 1.275" and the exhaust port, shaped D with dimensions of 1.467" by 1.614", contribute to effective exhaust expulsion and intake dynamics.
Equipped with intake and exhaust valves measuring 2.165" and 1.600" respectively, this design ensures robust airflow characteristics. The flow data, recorded at 28" (CFM), indicates impressive intake flow rates that peak at 338 CFM and exhaust flow rates that reach 228 CFM, demonstrating the head's capability for high-performance applications. Additional features such as a standard valve length, a valve angle of 15 degrees, and durable manganese bronze valve guides further enhance reliability and performance, making the OE 4 Head Bolt Design a prime choice for automotive enthusiasts seeking exceptional engine performance.
| Product Name | ENGINE PRO RACING Chevrolet LS3,L76,L77,L98 Rectangle intake ports, 15 degree OEM head bolt desig |
|---|---|
| Brands | Engine Pro |
| Engine | Chev LS 5.3L (15° Heads), Chev LS (15° Heads), GM / LS |
| Make | Chevrolet, Holden |
Delivery & Freight
We are an Australian-based company that ships items nationally and internationally, usually within 48 hours of receiving your order. High-value items shipped internationally are sent via DHL Express, while lower-value items are sent via Australia Post Express unless otherwise instructed.
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Disclaimer:
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Why choose matched valve springs for performance cams?
Spring pressure must match the cam profile and rpm limit. Too little causes valve float; too much causes wear.
Do I need adjustable cam gears?
They allow fine-tuning of cam timing, especially useful after head machining or when running non-standard cams.
What are the recommended applications for the ENGINE PRO RACING LS3 heads?
The ENGINE PRO RACING LS3 heads are designed for high-performance applications in Chevrolet LS engines, specifically those with 15-degree heads such as the LS3, L76, L77, and L98. They are ideal for enthusiasts looking to enhance airflow and combustion efficiency in both street and race setups.
What is the combustion chamber volume of these heads?
These heads feature a combustion chamber volume of 68cc, which is suitable for achieving a balanced compression ratio when paired with the appropriate piston setup. Ensure to calculate your compression ratio based on your specific engine configuration.
Do I need to modify my engine for these heads to fit?
While the ENGINE PRO RACING LS3 heads are designed to fit LS engines with 15-degree heads, it's essential to check for any necessary modifications, such as adjusting the intake and exhaust systems, ensuring proper clearance, and verifying that your existing components are compatible with the new heads.
What are the flow rates for intake and exhaust on these heads?
The ENGINE PRO RACING LS3 heads demonstrate impressive airflow capabilities, with peak intake flow rates of 338 CFM and exhaust flow rates reaching 228 CFM at 28 inches of water. These figures indicate their suitability for high-performance applications, but actual performance will depend on the entire engine build and tuning.
What type of valve guides are used in these heads?
These heads are equipped with durable manganese bronze valve guides, which provide excellent wear resistance and thermal conductivity. This feature enhances the reliability and longevity of the valve train, making them suitable for both street and race applications.
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