Page 667 - 2021-22 Auto Performance_Circle Track
P. 667
SB Chevy "Pro Action"
23° Aluminum Cylinder Head RHS12054
Top-quality, 23°
aluminum cylinder
head has "as cast"
ports and com-
bustion chambers,
bronze wall valve
guides, and competition valve job with multi-angled intake and exhaust seats. Sold individually as bare casting, cylinder head includes 200cc intake runners and straight-type spark plugs. Accepts original equipment-style components.
LS Aluminum
Race Block NEW!
RHS54903U
deck surface, raised cam center-
line, and priority main bearing oiling.
Cylinder walls are siamese-cast with press-in cast iron cylinder - ish. Block includes a 9.240" deck height, 4.125" cylinder bores, and allows for up to 4.600" stroke.
Part No.
Description
Intake Runner
Comb. Chamber
Intake Valve
Exhaust Valve
Related Component
Part No.
Description
RHS549202-1
Cam Bearing for LS Race Block, Each
Straight Plug Cylinder Head
200cc
64cc
2.020"
1.600"
1.600"
Fabricated Valve Covers
NEW!
Custom fabricated from premium
aluminum sheet, valve covers are ex-
ceptionally lightweight and offer superior sealing. Choose from required hardware.
Race Air Cleaner Kit RPCR8032 cleaner kit includes chrome-plated steel top,
Application
Anodized
Chrome
Polished
SB Chevy, 3-3/4" Tall w/o Holes, 1/4" Billet Rail
RPCR6144
—
RPCR6144POL
SB Chevy, 3-3/4" Tall w/Hole, 1/4" Billet Rail
RPCR6145
RPCR6145C
RPCR6145POL
SB Chevy, 3-7/8" Tall w/o Holes, 1/4" Billet Rail
RPCR6147
—
—
GM LS1, 2-1/2" Tall w/Coil Mtg. Brackets
RPCR6142
—
—
SB Ford, 3-1/2" Tall w/o Holes, 1/4" Billet Rail
RPCR6344
—
—
Circle Track Racing Tall Valve Covers
Offered for small block Chevy, left (driver) side tall covers have breather - ers are plain. Early style covers are raw, unplated steel; late, centerbolt style are polished aluminum. Both accept clamp-on breathers. Breathers must be purchased separately.
Valve Cover Gaskets NEW! Cork
Part No.
Description
Cork Part No.
—
Black Rubber w/Steel Core w/Steel Core
Blue Rubber w/Steel Core Part No.
—
RPCR6147
SB Chevy 1958-86 Fabricated Aluminum Valve Covers, No Holes
RPCR6150
SB Chevy 1987-97 Polished Aluminum Valve Covers, 1-1/2" O.D. Holes
RPCR7215RAW
SB Chevy 1958-86 Unplated Steel Valve Covers, 1-1/2" O.D. Holes
Description
SB Chevy, 1987-Up
Part No. Part No.
RPCR7487 RPCR7488
SB Chevy, 1955-86
RPCR7483X
RPCR7483
RPCR7484
RPCR7484X
SB Ford, 1962-85
—
—
RPCR7486
—
Polished Aluminum Valve Covers
Carb Mount Throttle Return Kit
RPCR2083
Chrome-plated steel kit attaches directly
4bbl. carburetors. Includes light and heavy spring sets, and necessary hardware.
Phenolic Carburetor Spacers NEW! Manufactured from a special phenolic material
which insulates the carburetor from the intake man- ifold and prevents heat transfer, spacers provide increased fuel density and added horsepower. carburetors.
Part No. Description
Covers are available in tall or short
(RPCR4996) to accept push-in crankcase breathers are available separately.
Description
Tall Part No.
Short Part No.
SB Chevy
1958-86 Valve Covers, No Holes
RPCR6030-1
—
1958-86 Valve Covers, (1) Hole
RPCR6130-2
RPCR6131-2
1987-97 Valve Covers, No Holes
RPCR6046
RPCR6036
1987-97 Valve Covers, (1) Hole
RPCR6146-1
RPCR6136-1
SB Ford
1962-85 Valve Covers, No Holes
RPCR6170
—
1962-85 Valve Covers, (1) Hole
RPCR6171
—
RPCR9134
1" Tall Carb Spacer, Ported 4-Hole
RPCR9135
2" Tall Carb Spacer, Ported 4-Hole
RPCR9136
1" Tall Carb Spacer, Open Style
RPCR9137
2" Tall Carb Spacer, Open Style
RPCR9138
1/2" Tall Carb Spacer, Ported 4-Hole
RPCR9139
1/2" Tall Carb Spacer, Open Style
TRACK
CIRCLE 2021-22
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