Page 545 - 2018 Racecar Engineering Drag Racing Parts and Accessories Catalog

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