EXHAUST HEADER SUFFIX DESIGNATION GUIDE
Suffix
Description
Suffix
Description
Suffix
Description 18° Chevy Crate 602
V “Stepped” Primary Tubes CM Crate Motor Application
N Y
18 **
Ford “N” Head Application
Tri-Y Header
SP
Spread Port Application
Straight-Out Short Headers 6PDOOEORFN&KHY\0RGL¿HGKHDGHUV have short primary tubes for crisp WKURWWOHUHVSRQVHDQGDÀDWWHUWRUTXH curve. Available in standard port design. Standard Part No. Description Primary Tube Dia.
/QFKƂGF*GCFGTU %QPVKPWGF Long Tube Headers (LH Straight Out/ RH Rear Exit) Left-side header is a straight-out style and right-side header is a con- ventional rear exit. Available for standard and spread port exhaust small block Chevys. Standard Part No. Description Primary Tube Dia.
Collector Dia. x Length
SCH162B Chevy Headers
1-3/4"
3-1/2" x 8"
Angle-Back Headers 2QHSLHFHDQJOHEDFNKHDGHUV¿W PRVWSRSXODU0RGL¿HGFKDVVLV Offered for small block Chevys only in standard port design. Standard Part No. Description Primary Tube Dia.
Collector Dia. x Length 3-1/2" x 8"
SCH1172 Chevy Headers SCH1176 Chevy Headers
1-3/4" 1-3/4"
3-1/2" x 8" SCH1176V “Step” Headers 1-3/4"-1-7/8" 3-1/2" x 9" ‡ RH Downswept * RH Upswept L Series Headers 20-1/4" out on left side. Standard Part No. 604 Crate Part No. Description Primary Tube Dia. Collector Dia. x Length Larry Shaw and Victory — SCH1155LCM2 Headers 1-5/8" 3" — SCH1155LV3CM-3 "Step" Headers 1-5/8"-1-3/4"-1-7/8" 1-7/8" x 3-1/2" — SCH1155LVCM-3 "Step" Headers 1-5/8"-1-3/4" 3" SCH1156L — Headers 1-3/4" 1-3/4" x 3-1/2" SCH1156LV — Step Headers 1-3/4"-1-7/8" 1-7/8" x 3-1/2"
Collector Dia. x Length 3-1/2" x 8" 3-1/2" x 9"
SCH172 Chevy Headers SCH173 Chevy Headers
1-3/4" 1-7/8"
Tri-Y Headers )RXULQWRWZRLQWRRQHFRQ¿JXUDWLRQFRPELQHG with “stepped” primary tubes delivers increased
torque. Available for standard, spread port or 18° small block Chevy. Standard Part No. Spread Port Part No. 18° Part No.
Description Collector Dia. Small Block Chevy - Fits Harris, Hoffman, J-Car, Impressive, Bob Pierce, and Victory chassis SCH1185VY — — “Step” Headers 1-5/8"-1-3/4" 3" SCH1186VY SCH1186VYSP SCH1186VY18 “Step” Headers 1-3/4"-1-7/8" 3-1/2" Fits Larry Shaw, J-Car and Elite Chassis SCH1195VY — — “Step” Headers 1-5/8"-1-3/4" 3" SCH1196VY — — “Step” Headers 1-3/4"-1-7/8" 3-1/2" Mid-Length Primary Fits BMS, Dirt Works, GRT, Harris, Hoffman, Jet Racing, and Larry Shaw Chassis. SCH1106VY — SCH1106VY18 “Step" Headers 1-3/4"-1-7/8" 3-1/2" Primary Tube Dia.
Straight-Out Headers One-piece headers utilize a straight-out primary tube and collector. Small block Chevy headers are for standard ex- haust ports.
Primary Tube Dia. 1-5/8" 1-3/4"
Collector Dia. x Length
Part No.
Description
SCH161 SCH162
Chevy Headers Chevy Headers
3" x 8"
3-1/2" x 8"
/QFKƂGF*GCFGTU %QPVKPWGF Two-Piece Adjustable Headers
Headers have removable collectors and employ a “stepped” primary tube design for increased horsepower and torque. Adjustable feature means existing collectors may be replaced with different slip-over collectors to allow adjustment of engine location.
Primary Tube Dia.
Collector Dia. x Length
LH-Style 6 RH-Style 8
LH-Style 9 RH-Style 8
LH-Style 9H RH-Style 8
Description
Small Block Chevy Standard Chevy
1-5/8"-1-3/4" 1-3/4"-1-7/8"
3" x 8"
— SCH161-98 — SCH162-98
SCH161-98H SCH162-98H
SCH162-98
Standard Chevy
3-1/2" x 9"
Small Block Ford Windsor
1-5/8"-1-3/4" 1-3/4"-1-7/8"
3" x 8"
—
— —
— —
Dart/“N” Head
3-1/2" x 9"
SCH362-68N
Note: Use chart below as reference for collector styles.
LH Style 3
LH Style 9
Replacement Adjustable Slip-Over Collectors Style 3 Style 6 Style 8 Style 9 Style 9H Tube Dia. I.D.
LH Style 6
Collector Dia.
No. of Tubes
SCHSO63043 SCHSO63046 SCHSO63048 SCHSO63049
— 1-5/8"
3"
4 4
RH Style 8
SCHSO73543
— SCHSO73548 SCHSO73549 SCHSO73549H 1-3/4"
3-1/2"
LH Style 9H
704
CIRCLE TRACK 2021-22
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