19417592 Cylinder Head (Aluminum Fast Burn), Repaces 19300955. 12464298
Chevrolet Performance's Fast Burn 23-degree cylinder heads deliver maximum performance for Small-Block engines. An Aluminum head casting-distingushed by Chevy Bowtie logos at each and-and a valvetrain with high-rpm, LS-style beehive-type vlave springs stretches the performance range of the heads to enable greater power at a higher rpm. Fast Burn technology delivers more horespower by increasing cylinder pressures, which maximizes the air/fuel misture's combustion. The 62cc compuston chamber is designed for use with flat-top pistons. The CNC-machined Fast Burn heads require no additional porting for optiomal performance, so all you need to do is bolt them onto your Small-Block and go! They can be used on any Small-Block engine with at least 4.000-inch bores and the standard-flow coolant system. Not for use on Gen II 1992-1996 LT1/LT4 engines with reverse-flow cooling system.
19417592 Fast Burn Aluminum Cylinder Head Assembly
- CNC-machined aluminum performance cylinder head
- Completely assembled with 2.000"/1.550" valves
- 210cc intake port, roof raised .240"
- 78cc D-shaped exhaust ports, raised .200" — requires
Fel-Pro® exhaust gasket P/N 1470 (may require minor trimming)
- 62cc combustion chamber, .400" deck (can be milled up to .060")
- No heat riser
- Angled spark plugs (5⁄8" hex, 3⁄4" reach, tapered plugs)
- 1.48" valve spring seat diameter
- Use head gaskets with stainless steel fire rings
- Raised, machined rocker rails
- .530" maximum valve lift (without modifications)
- Screw-in studs (3⁄8" top, 7⁄16" bottom)
- New “time-serts” prevents oil migration through
rocker studs
- Dual bolt patterns for perimeter-bolt and center-bolt
valve covers
- Dual bolt patterns for Vortec and early-model intake manifolds
- Machined bare head P/N 19417591
- Use intake gasket P/N 19301685