SKU: GMP19417592
MPN: 19417592
The Fast Burn Cylinder Head Assembly is Chevrolet Performance's 23-degree aluminum head built for serious small-block Chevy power. This is the assembled version, shipped complete with valves and springs, so a builder bolts it on without sourcing a valve job or spring package separately. It fits 1958-2000 small-blocks from 283 to 400 cubic inches running conventional water flow, and supports horsepower in excess of 500 per manufacturer specifications. Anyone building a street/strip 350 or stroker who wants flat-top piston efficiency and high-RPM breathing from a name-brand casting will find this is the head that does the work. Browse our full engine components selection for matching parts.
The casting carries 210 cc intake ports with the roof raised .240 inch, 78 cc D-shaped exhaust ports raised .200 inch, and 62 cc combustion chambers at the .400-inch deck height. Chambers can be milled to .060 inch to bump compression. Valves measure 2.000 inches intake and 1.550 inches exhaust, and the LS-style beehive springs seat on a 1.48-inch diameter and clear up to .530-inch lift without modification. Screw-in rocker studs (3/8 inch top, 7/16 inch bottom) and angled spark plug holes with 3/4-inch reach come standard. Dual valve cover and intake bolt patterns accept both perimeter-bolt and center-bolt covers, plus Vortec and early-model intake manifolds. Time-Serts in the rocker studs stop oil migration, and the casting requires no heat riser. Pair these heads with matching valve springs and a compatible rocker arm setup.
These heads belong on a performance build aimed at the track or an uncontrolled vehicle. They are not legal for sale or use on emissions-controlled vehicles and will not work on Gen II 1992-96 LT1/LT4 or LS1 engines that use reverse-flow cooling, so verify your block uses conventional water flow and at least a 4.000-inch bore before ordering. Plan on a Fel-Pro exhaust gasket P/N 1470 for proper sealing. A builder dropping these onto a flat-top 350 gets the cylinder pressure and combustion efficiency that make the Fast Burn design move air. Round out the project with a fresh timing kit.
They fit 1958-2000 small-block Chevy engines from 283 to 400 cubic inches with conventional water flow and a minimum 4.000-inch bore. They are not compatible with Gen II 1992-96 LT1/LT4 or LS1 engines, which use reverse-flow cooling.
This part number, 19417592, is the assembled version. It ships complete with valves and LS-style beehive valve springs already installed, so it is ready to bolt on without a separate valve job or spring package.
Per manufacturer specifications, the Fast Burn aluminum head supports horsepower in excess of 500. The 23-degree chamber design is optimized for flat-top pistons and increases cylinder pressure for stronger combustion.
These heads require a Fel-Pro exhaust gasket P/N 1470 for proper sealing. They use screw-in rocker studs measuring 3/8 inch on top and 7/16 inch on the bottom, and accept angled spark plugs with a 3/4-inch reach.
No. These heads are not legal for sale or use on emissions-controlled vehicles. They are intended for uncontrolled vehicles or closed-course competition racing only.
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