Chevy “Double Hump” Cylinder Heads

Chevy Double Hump Fuelie Heads

The “double hump” or “fuelie” heads have been around since the 1960’s. They are still used in a variety of applications. We have a good supply of used ‘186 & ‘492 heads available with everything from “Undercover Porting” to CNC Sportsman Porting.

Stock “double hump” heads flow 202 cfm intake and 141 cfm on the exhaust. If you must maintain a stock looking port, consider our “Undercover Porting”. With our “Undercover Ported” they will flow 220-230 cfm intake and 165 cfm exhaust. This flow improvement will add 15 to 25 horsepower to your engine.

We may be the only company around with CNC programs for the “double hump” heads. An option to consider is to use the aftermarket Dart heads with a disguise package to resemble the original “double humps”. The Dart heads offer superior air flow to the early “double hump” heads. Masters of Disguised Heads.

Below is the pricing when we have Double-Hump head cores available.  As of 5/1/2023 we do not have cores; we will need to modify heads that you supply.  

Part #

Complete “Double Hump” heads with “Under­cover Porting“.  Assembled with 11/32” stainless steel valves, flat tappet springs, spring locators, steel retainers, machined locks, flat surfaced to your specifications.

“Double Hump” castings, bare, new guides & “Undercover Porting“.

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