SB Chevy “Pro Action” 23° Aluminum Cylinder Head Top quality,
LS7 “Pro Elite” Aluminum Cylinder Head RHS54504
“Pro Elite” cylinder head utilizes .220” raised intake
23° aluminum cylinder head has “as cast” ports and com- bustion cham- bers, bronze
ports and fully CNC-ma- chined runners to deliver exceptional cylinder head flow. Head, which is cast from 355-T6 aluminum, additionally features
wall valve guides, competition valve job, and multi-angled intake and exhaust seats. “Pro Action” aluminum head is available with 200, 220 or 235cc intake runners, choice of straight or angled spark plugs and is sold individually as a bare casting. Accepts original equipment type components.
CNC-machined combustion chambers, .750” thick decks, reinforced rocker rails and a 6-bolt design that allows compatibility with standard 4-bolt or aftermarket, 6-bolt blocks. The 307cc intake runner version is engineered for extra large displacement engines. Sold individually as bare castings. Intake Intake Exhaust Part No. Description Runner Valve Valve RHS54504 Big Port LS7 Cylinder Head 307cc 2.250” 1.615” LS Aluminum Race Block RHS54903U The LS Race Block adds the benefits of an extra thick .750" deck surface, raised cam centerline and priority main bearing oiling. Cylinder walls are siamese cast with press-in cast iron cyl- inder liners. Patented, Clean Cast Technology provides a superior finish. Block includes a 9.240" deck height, 4.125" cylinder bores and allows for up to 4.600" stroke. Part No. Description Related Component RHS549202-1 Cam Bearing For LS Race Block, Each SB Ford Aluminum 20° Cylinder Heads The perfect performance upgrade for 289-351W small block Ford. “Pro Action” heads feature Clean Cast Technology for superior flowing ports right out of the box, while “Pro Elite” heads have CNC-machined runners and combustion chambers for maximum performance. Dual bolt pattern exhaust allows compatibility with stock manifolds or headers. Heads require +.100" longer valves. Sold individually as bare castings.
Intake Runner
Comb. Chamber
Intake Valve 2.020"
Exhaust Valve
Part No.
Description Straight Plug Cylinder Head Angle Plug Cylinder Head Angle Plug Cylinder Head Angle Plug Cylinder Head
RHS12054
200cc
64cc
1.600"
RHS12055
200cc
64cc
2.020"
1.600"
RHS12059
220cc
64cc
2.020"
1.600"
RHS12062
235cc
64cc
2.080"
1.600"
SB Chevy 23° Aluminum Intake Manifold RHS12902
Engineered specifically to port match directly with small block Chevy “Pro Action” alumi- num cylinder heads, single plane intake manifold includes a 4150 flange and isolated runner design for improved performance.
Manifold, which is well suited for applications with up to 434 cu. in., includes auxiliary water ports, internal water crossover and dual sided distributor mounting points.
BB Chevy “Pro Action” 24° Aluminum Cylinder Head RHS11011 Big block Chevy cylinder head
combines higher flow characteris- tics, unmatched quality and superior engineering. Well suited for street/strip or drag race only engines, the “as cast" cylinder head incorporates rolled over valve angles, open heart-shaped combustion chambers, and a competition valve job. Sold individually as a bare casting.
Intake Runner
Comb. Chamber
Intake Valve
Exhaust Valve
Part No.
Description
“Pro Action” 20° Cylinder Head 200cc “Pro Action” 20° Cylinder Head 215cc “Pro Action” 20° Cylinder Head 200cc “Pro Elite” 20° Cylinder Head 205cc “Pro Elite” 20° Cylinder Head 221cc
Intake Runner
Comb. Chamber
Intake Valve 2.250"
Exhaust Valve
RHS35012
58cc
2.020" 1.600"
Part No.
Description
“Pro Action” 24° Cylinder Head 320cc
RHS11011
119cc
1.880"
RHS35013
58cc
2.080" 1.600"
RHS35016
64cc
2.020" 1.600"
RHS35020
62cc
2.055" 1.600"
RHS35025
62cc
2.080" 1.625"
543
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