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390-420-460 Big Valve 37.5/32mm Wedge Cylinder Head
Big Valve 37.5/32mm Cylinder Head for Big Block Honda-Clone Engines
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390-420-460 Big Valve 37.5/32mm Wedge Cylinder Head

Part Number: 188F-11200-1K
Online Price: $299.99
Phone Order Price:$349.99
You Save:$50.00(14%)
Cylinder Head Clone 390-420-460 Non-Hemi Wedge
Availability: In Stock.

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The Big Valve Head for the Honda GX390, Predator 420/459, Wildcat 460, and other Big Block Clones.

EC has made an effort to bring more performance parts to the big block clone platform. One of the first places they wanted to start was with the cylinder head. As you may already know, power is made in the cylinder head. The head is the cornerstone for the rest of the combination. To get more from the stock cast cylinder heads, bigger and stronger valves will be required if you are to run more aggressive cams, higher rocker ratio, and stronger valve springs. 

To make that possible, the head has a 37.5mm intake with a 32mm exhaust to improve airflow. These valves drop into the 6.5mm valve guides but use the more common 6mm retainers and locks. EC has made 6mm titanium retainers to handle the abuse of a high demanding, high rpm setup. 

Each Head is set up with Springs and Retainers to support up to .420 max lift. 

Install height 1.150

Close Seat Pressure 70lbs

Open Seat Predator at .730 (.420 Lift) 147lbs

Coil Bind .690

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