LSX Cylinder Head Footnotes
- General special parts/requirments
- As with all aftermarket heads, a different lenght pushrod might be required.
- Valve Springs: AFR springs that come standard with our assembled packages are very high quality and are sufficient for most applications. However, forced induction applications and cams with aggressive ramp rates (some cam manufacturers now offer much faster ramp designs and more aggressive cam profiles) may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is more ideally suited to your application.
- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080 on the intake valve and .100 on the exhaust with a radial clearance of .200 minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough...the position of the valve pocket must also be addressed.
- See below what factory OEM head AFR used for CAD/CAM modeling.
- Please see footnotes and the specific product page your researching for specific variences from OEM heads.
- AFR LS1
- Was modeled after the GM LS6 #243 aluminum cylinder head.
- AFR LS1 cylinder heads do not have provisions for 1997-1998 perimeter bolt valve covers, conversion kits available.
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Air Flow Research
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28611 W. Industry Drive
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Valencia, CA 91355
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661-257-8124
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