CYLINDER HEADS
283-400 (Cont.) Engine Quest Vortec Bolt-On Performance for 350 CID All EQ performance cylinder heads have AS-CAST combustion chambers, Dura-Bond exhaust seats, 3-angle valve job, thick deck faces for angle milling, phosphor bronze intake and exhaust guides, are machined for guide plate use, and feature raised intake runner ports for increased performance. Sold individ- ually.
Intake Runner 170cc
Comb. Chamber
Plug Angle
Valve Angle
Intake Valve
Exhaust Valve 1.500"
Part No.
Description
ENQCH350C
Bare Head, Vortec
64cc
Straight
23°
1.940"
Bare Head, IMCA Spec Head, UMP Legal
ENQCH350I
176cc
76cc
Straight
23°
1.940"
1.500"
FLOTEK Aluminum Cylinder Heads Flo-Tek aluminum cylinders heads feature high-flow 180cc intake runners & 62cc exhaust runners. Assembled versions include bronze valve guides, 5-angle valve job, stainless intake and exhaust valves, hardened locks and retainers, PC valve seals, 3/8” rocker studs, and guideplates. Available in straight or angled plug design. Sold individually.
FTC101500
Intake Runner 180cc 180cc 180cc 180cc
Comb. Chamber
Plug Angle Angle Angle
Valve Angle
Intake Valve
Exhaust Valve 1.600" 1.600" 1.600" 1.600"
Part No.
Description
FTC101500 FTC101505 FTC102500 FTC102505 †
Cylinder Head, Bare Head Cylinder Head, Assembled Cylinder Head, Bare Head Cylinder Head, Assembled
64cc 64cc 64cc 64cc
23° 23° 23° 23°
2.020" 2.020" 2.020" 2.020"
Straight Straight
† FTC102505 is available with 1.560" dia. flat tappet springs assembled. Add an FT at the end of the part number.
GM Cast Iron Vortec Cylinder Head The Vortec head significantly outflows the non-Vortec replacement head and offers a 20-40 horsepower increase over earlier cast iron heads. They will fit 1955 and after small-blocks except for the LT1/LT4 engines. (These heads require Vortec-specific intake manifolds). Sold individually.
Intake Runner 170cc 185cc 225cc
Comb. Chamber
Plug Angle
Valve Angle
Intake Valve
Exhaust Valve 1.500" 1.550" 1.550"
Part No.
Description
GMP12691728
Assembled Cast Iron Vortec Head
64cc 66cc 66cc
Straight Straight Straight
23° 23° 23°
1.940" 2.000" 2.000"
GMP19331470 Assembled - 1.320" Single Valve Spring GMP19331472 Assembled - 1.320" Single Valve Spring
Racing Head Service Aluminum “Pro Action” Head High-flow 23° aluminum cylinder heads. Each head is fitted with bronze wall valve guides and hardened exhaust seats. Accepts standard or late model center bolt valve covers. Available with 200cc, 220cc, or 235cc intake runner volumes and are sold indi- vidually as bare castings.
Intake Runner 200cc
Comb. Chamber
Plug Angle
Valve Angle
Intake Valve
Exhaust Valve 1.600"
Part No.
Description
RHS12054
“Pro Action” Aluminum Head, Bare Head
64cc
Straight
23°
2.020"
55
2021-22 ENGINE BUILDER CATALOG
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