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Cylinder Heads

Cylinder Heads

CNC Dart Big Chief Chamber

How To Build Racing Engines: Cylinder Heads

February 27, 2016 @ 3:34 am
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When selecting a cylinder head for a particular application it is important to closely match the desired RPM range based on port dimensions that include port length, cross section, and mid- and high-range flow rates...

Dart Reveals New Billet LS Cylinder Head

December 16, 2015 @ 4:33 pm
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Dart Machinery has revealed some details of its forthcoming all-new billet LS cylinder head which breaks new ground by coming with full water jacketed cooling. Its the last of the OEM level pushrod style engines that offers grass root enthusiasts...
RTS PD Valve

RTST Ported Flow Testing Valves

June 14, 2015 @ 6:47 pm
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The RTS kit permits precise mapping of the airflow values around the circumference of the valve at any lift value. It helps identify shrouded...

Fifty Years with Valley Head Service

May 4, 2015 @ 10:34 pm
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Fifty years ago this month Larry Ofria began porting cylinder heads in a run-down old chicken coup at the family property on Sherman Way in Reseda, California. Larry and the engine savvy crew at Valley Head Service are recognized far and wide for their contributions to the advancement of high performance engine...
LS7 cam and heads

New LS7 Cam and Cylinder Head Package for 2010 and later Camaros

November 6, 2013 @ 9:51 pm
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Chevrolet engineers have developed a new cylinder head and camshaft package designed to be a direct replacement for 2010 and later Camaro SS models. The new factory power package revolves around a set of CNC-ported LS3 cylinder heads sporting 2.156/1.590-inch valves...
AFR LS Mongoose Cylinder Heads

AFR Mongoose Strip Cylinder Heads for GM LS

June 22, 2012 @ 6:43 pm
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Increase performance and save yourself the hassle of having the stock heads reworked by replacing them with AFR’s 225cc Mongoose Strip Cylinder Heads. The new combustion chamber design with a double quench area generates huge low and mid-lift airflow numbers. The heads are ideal for aggressive, normally aspirated 396-427 cubic inch...
RHS Pro elite heads

Make More Power With An RHS Pro Elite Cylinder Head

June 19, 2012 @ 10:32 pm
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RHS Pro Elite cylinder heads set the standard with unrivaled performance, superior quality and cutting-edge design features. Perfect for extreme performance and race applications, RHS Pro elite headsRHS Pro Elite heads are available as cast, assembled or RHS Pro Elite heads are available as cast, assembled or CNC ported in a variety of runner/chamber configurations to fit...

Dart 18° Big Chief Cylinder Head Selection

May 26, 2012 @ 10:03 pm
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We selected a set of Dart 18° Big Chief cylinder heads for this project. They are offered as cast or with your choice of Super Mod porting or Full Port CNC porting. To match our application we chose the Super Mod porting configuration.