Page 616 - 2020-2021 Racecar Engineering Drag Racing Parts and Accessories Catalog

2020 DRAG RACING

Small Block Chevy Drag Racing Headers Slip-On 4-Tube Collectors
Schoenfeld exhaust headers are Part No. De scrip tion
custom fabricated from mild steel and SCHSO03541 Fits 2" Primaries, 3-1/2" Collector
SCHSO63041
Fits 1-5/8" Primaries, 3" Collector
include rigid flanges, precision-formed primary SCHSO73041 Fits 1-3/4" Primaries, 3" Collector
tubes and four-into-one collectors. Applications listed SCHSO73541 Fits 1-3/4" Primaries, 3-1/2" Collector
SCHSO83541
Fits 1-7/8" Primaries, 3-1/2" Collector
fit small block Chevy with standard 23° cylinder SCHSOM72530 Fits 1-3/4” Primaries, 3” Merge Collector
heads. Headers with a “V” suffix in the part number
feature “stepped” primary tubes for increased exhaust Turn-Outs
velocity. All headers fit straight or angle-plug cylinder heads and require Angle the exit of exhaust in any direction.
short-style oil filter. Sold per pair, complete with fasteners, gaskets, and
Size
instructions. Part No. 2-1/2" Length
10"
SCH2525
Primary Collector SCH3023 3” 4-1/4”
Part No. Description Tube Dia. Dia. x Length SCH3025 3" 10"
1973-88 GM “G” Body; 1970-81 GM “F” Body SCH3026 3" 15-1/2"
SCH185* SB Chevy Exhaust Headers 1-5/8" 3" x 8" SCH3525 3-1/2" 10"
SCH185V* SB Chevy Exhaust Headers 1-5/8"-1-3/4" 3" x 8" SCH4025* 4" 10-1/2"
SCH186-3* SB Chevy Exhaust Headers 1-3/4" 3" x 8" SCH5025 5" 12"
SCH186* SB Chevy Exhaust Headers 1-3/4" 3-1/2" x 8" SCH2525-3 2-1/2" Inlet Swedged To Fit Over 3" Pipe 10"
SCH186V* SB Chevy Exhaust Headers 1-3/4"-1-7/8" 3-1/2" x 9" SCH3524 3-1/2" 8"
SCH187* SB Chevy Exhaust Headers 1-7/8" 3-1/2" x 9" * Aluminized
1970-81 GM “F” Body; 1975-79 GM “X” Body; 1970-72 Monte Carlo Only
SCH165A† SB Chevy Exhaust Headers 1-5/8" 3" x 8"
SCH165VA† SB Chevy Exhaust Headers 1-5/8"-1-3/4" 3" x 8" Collector Extensions
SCH166A† SB Chevy Exhaust Headers 1-3/4" 3-1/2" x 8"
SCH166VA† SB Chevy Exhaust Headers 1-3/4"-1-7/8" 3-1/2" x 9" Extensions are typically used to increase bottom end torque.
* Will not fit OEM manual clutch linkage ball or A/C equipped applications. † For cars with 12" 24" 30" 36" 48"
engine in stock location or engine set back. Clears side and rear engine mounts. Will not fit Description Length Length Length Length Length
Chevelle. 3" Dia. SCH120030 SCH240030 — SCH360030 SCH480030
3-1/2" Dia. SCH120035 SCH240035 SCH300035 SCH360035 SCH480035
Header Gaskets
Header Tab Kit
The same gaskets that are packed with Schoenfeld headers. Sold individually.
Typically used to secure slip-on collectors to
Part No. Description
SCH01501 SB Chevy, 1-5/8" Square headers, or to secure collector extensions
SCH01511 SB Chevy, 1-3/4" “D” Port to collectors. Two tab sets per collector are
SCH01562 SB Chevy, LT1, 602 Crate recommended.
SCH3006-12
Part No. Description
Header Bolts SCH4003-4 Kit Includes (8) Tabs, (4) Bolts, (4) Lock Nuts And (8) Washers
Part No. Description SCH4003-6 Kit Includes (12) Tabs, (6) Bolts, (6) Lock Nuts And (12) Washers
SCH3002-16 3/8" x 1"L x 5/16" Hex Head, 16-Pack
SCH3006-12 3/8" x 3/4" L. x 5/16" Hex Head, 12-Pack
SCH3006-14 3/8" x 3/4" L. x 5/16" Hex Head, 14-Pack
SCH3006-16 3/8" x 3/4" L. x 5/16" Hex Head, 16-Pack

Firewall Grommets
3" diameter (unless specified) grommets may be fastened to firewall with
rivets or bolts to provide leakproof passage for hoses and wires. Eliminate
Gauge Isolators sharp edges which cause electrical shorts or fluid leakage.
Use between gauge and dash or gauge panel to Part No. Description
dampen vibration. SICGS10034 -4AN Hose
SICGS10036 -6AN Hose
Part No. Description SICGS10038 -8AN Hose
SICDB206225 2-1/16” Gauge Isolator SICGS100310 -10AN Hose
SICDB260275 2-5/8” Gauge Isolator SICGS100312* -12AN Hose
SICGS100316 -16AN Hose
SICGS100320 -20AN Hose
SICGS1003BL Blank
SICGS4001WPT Blank, Pointed, 2” O.D.
* May be used to seal a 3/4” dia. steering shaft.

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