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Tech Review—Brodix Head Hunter F-Series

Russell Stone uses his 1986 Mustang GT to showoff the capabilities of the Brodix Head Hunter F-Series 15-degree cylinder head. The 360ci engine relies on a Precision 94mm turbocharger to help it run 4.40s at over 160 mph in NMRA competition.


By Michael Galimi

Photos Courtesy of Brodix and Fastest Street Car Magazine

The name Brodix has been synonymous with success in NMRA Keystone Drag Racing as their cylinder heads have helped produce record runs and earn championships through a variety of eliminators over the years. Their latest small-block Ford offering builds upon their success in the racing market. Coming out of their Head Hunter line-up, which is a category that is reserved for full-race, top-of-the-line products, is their F-Series 15-degree cylinder heads.

The F-Series 15-degree heads are the first Head Hunter series product for the small-block Ford and Brodix made a bold statement with it. One of the first specs noticed is the “shallow” valve-angle of 15-degrees, which is five less than a conventional 20-degree cylinder head. The lower valve angle allows the engineers to increase the valve size as well as move it away from the cylinder wall for increased flow, otherwise known as un-shrouding the valve. Brodix delivers complete heads with 2.180-inch intake valves and the exhaust side features 1.600-inch valves. The cylinder head is also available in many stages from bare castings to assembled packages and are made in the USA.

Everyone likes to talk about flow numbers and the Head Hunter definitely doesn’t disappoint in that department. Out-of-the-box performance shows 412cfm at .800-inch lift with the industry standard 28-inches of water. We would assume it was also measured using a 4.125-inch bore, another standard in flow bench testing for race-style heads. The intake runner is listed as 302cc. Moving to the exhaust side, the flow numbers continue to raise eyebrows with an impressive 247cfm. The combustion chamber measures 60cc.

We caught up with Russell Stone of Kuntz and Company who has been a big proponent of the Head Hunter 15-degree cylinder head. He told us at a recent NMRA race that the Head Hunter F-Series could be used on anything from a naturally aspirated engine that approaches four-digit output to a large displacement small-block that relies on nitrous oxide for big power. You didn’t hear this from us, but a popular grudge package from Kuntz is a 400-plus cubic inch engine with the Head Hunter heads, cast intake, and a plate nitrous system. The conventional-style nitrous combination helps Mustangs run deep into the 4s—with ease—on 275 radial or 28×10.5-inch tires.

If nitrous or naturally aspirated combinations aren’t your thing, then there is a boosted version of the Head Hunter package from Kuntz, as well. Stone’s eyes lit up when he began to describe the 360ci package, which uses an 8.7-inch deck 302 block. It can be ordered for either a turbocharger or supercharger setup and is legal for VP Racing Fuels Street Outlaw in both NMRA and NMCA and in NMCA Xtreme Street, depending on the turbocharger or supercharger sizing. Stone has opted to display the engine’s capabilities in one of his racecars, a 1986 Mustang GT, which is entered in Street Outlaw. With the Head Hunter 15-degree cylinder head as the centerpiece of the conventional style engine, Stone has run 4.40s at over 160 mph on 275 radial tires.




Kuntz and Company


Mike Galimi
Mike Galimi
Mike Galimi is the Director of Content & Marketing at ProMedia Publishing and Events with nearly 20 years of experience in motorsport writing and photography.