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
/QFKƂGF*GCFGTU %QPVKPWGF TWO-PIECE ADJUSTABLE HEADERS
+HDGHUVKDYHUHPRYDEOHFROOHFWRUVDQGHPSOR\D³VWHSSHG´SULPDU\WXEHGHVLJQIRULQFUHDVHG KRUVHSRZHUDQGWRUTXH$GMXVWDEOHIHDWXUHPHDQVH[LVWLQJFROOHFWRUVPD\EHUHSODFHGZLWK GLIIHUHQWVOLSRYHUFROOHFWRUVWRDOORZDGMXVWPHQWRIHQJLQHORFDWLRQ
Primary Tube Dia.
Collector Dia. x Length
LH-Style 3 RH-Style 8
LH-Style 6 RH-Style 8
LH-Style 9 RH-Style 8
LH-Style 9H RH-Style 8
SCH161-68
Description
Small Block Chevy Standard Chevy
1-5/8"-1-3/4"
3" x 8"
SCH161-38
SCH161-68
SCH161-98 SCH162-98
SCH161-98H SCH162-98H
Standard Chevy
1-3/4"-1-7/8" 3-1/2" x 9" 1-3/4"-1-7/8" 3-1/2" x 9"
— SCH162-68
Spread Port
—
— SCH162-98SP
—
Small Block Ford Windsor
1-5/8"-1-3/4"
3" x 8"
—
—
— —
— —
LH Style 3
Dart/“N” Head 1-3/4"-1-7/8" 3-1/2" x 9"
— SCH362-68N
LH Style 9
Note: Use chart below as reference for collector styles.
LH Style 6
REPLACEMENT ADJUSTABLE SLIP-OVER COLLECTORS Style 3 Style 6 Style 8 Style 9 Style 9H
Tube Dia. I.D.
Collector Dia.
No. Of Tubes
RH Style 8
SCHSO63043 SCHSO63046 SCHSO63048 SCHSO63049
— 1-5/8"
3"
4 4
LH Style 9H
SCHSO73543 SCHSO73546 SCHSO73548 SCHSO73549 SCHSO73549H 1-3/4"
3-1/2"
Street Stock Headers CAMARO/MONTE CARLO HEADERS
GM “A”/“F”/ “G” BODY HEADERS 3RSXODUVWUHHWVWRFNKHDGHUV¿W
&RQYHQWLRQDOVW\OHKHDGHUV¿WVPDOOEORFN &KHY\VLQ &DPDUR)LUHELUG 0RQWH&DUORDQG 1RYD
SCH166
VPDOOEORFN&KHY\HQJLQHVLQ *0³$´*%RG\ 0DOLEX0RQWH&DUOR *UDQG3UL[5HJDO&XWODVV DVZHOODV &KHY\&DPDUR3RQWLDF)LUHELUG³)´ERG\ +HDGHUVFOHDUVLGHDQGUHDUHQJLQHPRXQWVDQG ¿WVWUDLJKWRUDQJOHSOXJVWDQGDUGH[KDXVWSRUW F\OLQGHUKHDGV0XVWXVHVKRUW )5$3+ RLO¿OWHU Standard Part No. Spread Port Part No. Crate Motor Part No. Description Primary Tube Dia.
ZLOOQRW¿W&KHYHOOHXQOHVV VSHFL¿HG ZLWKWKHHQJLQHLQ WKHVWRFNRUVHWEDFNORFDWLRQ+HDGHUVFOHDUVLGHRUUHDUHQJLQH PRXQWVVWRFNFOXWFKOLQNDJHVWUDLJKWRUDQJOHSOXJDQG¿W VWDQGDUGH[KDXVWSRUWKHDGV0XVWXVHVKRUWRLO¿OWHUVXFKDV :,; RU$&3)6ROGFRPSOHWHZLWKJDVNHWVDQGEROWV Standard Part No. Crate Motor Part No. Description Primary Tube Dia. Collector Dia. x Length SCH165A SCH165ACM SCH165ACM2** Chevy Headers 1-5/8" 3" x 8" SCH165VA — Chevy “Step” Headers 1-5/8"-1-3/4" 3" x 8" SCH166A — Chevy Headers 1-3/4" 3-1/2" x 8" SCH166 † — Chevy Headers 1-3/4" 3-1/2" x 8" SCH386N + — Small Block Ford Header 1-3/4" 3-1/2" x 8"
Collector Dia. x Length
SCH185
— SCH185CM
1-5/8"
3" x 8"
SCH185MCM2** Chevy Headers
SCH185M* SCH185V SCH186 SCH186V SCH186-3 SCH186M-3 †
— SCH185MCM Chevy Headers
1-5/8"
3" x 8"
— SCH185VCM “Step” Headers 1-5/8"-1-3/4" 3" x 8"
— — — — —
— Chevy Headers
1-3/4"
3-1/2" x 8"
— “Step” Headers 1-3/4"-1-7/8" 3-1/2" x 9"
— Chevy Headers — Chevy Headers — Chevy Headers
1-3/4" 1-3/4" 1-7/8" 1-3/4"
3" x 8" 3" x 8"
† Also fits 1964-77 Chevelle. ** 602 crate + Fits wide Dart bolt pattern and “N” head
SCH187
3-1/2" x 9" 3-1/2" x 9"
—
— SCH186CM Chevy Headers
— SCH187SP 1-7/8" * Must use short oil filter. Will clear stock manual clutch linkage ball. ** 602 crate † Fits 1970-81 Camaro. Must use short oil filter. Will clear stock manual clutch linkage ball. — Chevy Headers
STOCK CLIP OVER FRAME RAILS HEADERS +HDGHUVH[LWRYHUWKHIUDPHUDLOVDQGDUHQRW FRPSDWLEOHZLWKVWRFN¿UHZDOOV6PDOOEORFN &KHY\KHDGHUV¿WVWDQGDUGH[KDXVWSRUWVRQO\ DQGDUHFRPSDWLEOHZLWKVWUDLJKWRUDQJOH SOXJF\OLQGHUKHDGV6ROGFRPSOHWH ZLWKEROWVDQGJDVNHWV
STOCK CLIP FENDER EXIT HEADERS (OLPLQDWHVFOHDUDQFHSUREOHPVZKHQ XVLQJFKDVVLVVW\OHKHDGHUVRQ
Primary Tube Dia.
Collector Dia. x Length 3-1/2" x 8" 3-1/2" x 8"
&DPDURDQG *0PHWULFFOLSFDUV6PDOO EORFN&KHY\RYHUWKHIUDPHVW\OHKHDGHUVH[LWRXWDW PLGIHQGHUDQGDUHFRPSDWLEOHZLWKWKHVWRFN¿UHZDOODQG XSSHU$IUDPHVZLWKWKHHQJLQHLQWKHVWRFNORFDWLRQ
Part No. SCH122 SCH126* SCH155 SCH155V SCH156
Description
Chevy Headers
1-3/4" 1-3/4" 1-5/8"
Chevy Headers, RH Rear Exit Chevy Headers, Exit At 45° Angle
3" x 8"
Chevy “Step" Headers
1-5/8"-1-3/4" 3-1/2" x 8"
Primary Tube Dia. 1-5/8" 1-3/4" 1-5/8" 1-3/4"
Collector Dia. x Length
Chevy Headers, Exit At 45° Angle
1-3/4"
3-1/2" x 8"
Part No.
Description
Ford Headers
1-3/4"-1-7/8" 3-1/2" x 9"
SCH356VN † SCH155V-3 SCH156VLS1
SCH103 SCH104
1970-81 Camaro Headers 1970-81 Camaro Headers
3" x 8"
Chevy Step Headers
1-5/8"-1-3/4"
3" x 8"
3-1/2" x 8"
Chevy LS1-LS7 Step Headers
1-3/4"-1-7/8" 3-1/2" x 9"
SCH107 1978-82 GM Metric Headers SCH108 1978-82 GM Metric Headers
3" x 8"
3-1/2" x 8"
* Will not fit with stock A-frames. † Fits Dart wide bolt pattern and Sportsman “N” head.
684 2019-20 CIRCLE TRACK PARTS AND ACCESSORIES
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