Marine and RV Parts Supply: Osco Parts List

Note: Additional gaskets, plates, spacers, and mounting hardware can be purchased separately. See catalog icon to checkout the many options available. Contact Marine and RV Parts Supply for more details.

Model

Description

Retail Price

Your Price

150

Manifold End Plate
Used on Chrysler M383, M400, M440 engines, Used up to 1975

$39.95

$22.82

639

Elbow, 3" Outlet w/90 Degree Down Angle used on I/O

Used for inboard/outboard applications. Replaces Chrysler #’s 2469639 and 2847405. Use mounting kit 480-MK or 480-MK-FW.

$169.95

$98.76

689

Riser, Use w/639 and 794 Elbows

Used with 639 and 794 elbows. Replaces Chrysler # 2846689. Use mounting kit 480-MK or 480-MK-FW.

$164.95

$95.66

794

Elbow, 3" Outlet w/90 Degree Down Angle used on INBD

$136.95

$80.23

Used for inboard applications. Replaces Chrysler # 3527794. Use mounting kit 480 MK or 480MKFW.

826

Manifold, Chrysler, LM318-M360 Log Style

$319.95

$182.73

Chrysler LM318-360 Log Style V8 exhaust manifold. Fits 318 - 360 cu.in. Chrysler small block V8 engines. Exact replacement for Chrysler #’s 24695566 and 3675826.

992

Riser

3" outlet, 10º down angle. Replaces Barr # 20-0082. Use mounting kit 992-MK or 992-MK-FW.

$133.95

$77.84

994

Exhaust Manifold 4" Outlet, CTR Rise, GM SM Block

$245.95

$140.92

Fits 305 - 350 cu.in. GM Small Block V8 engines. Replaces Barr # CHV-1-83 and Marine Power # 0994-000. Also used on Indmar. Use mounting kit 994-MK.

1851

3" Exhaust Extension Riser
Fits OSCO 5603 and 5604 manifolds with OSCO 6351 and 6771 risers, Replaces Mercruiser 61851

$97.49

$57.11

2018

3” Exhaust Riser, 30 Deg Down Angle

$164.95

$92.58

Riser, 3" outlet, 30º down angle. Replaces Barr # 20-0102 and Indmar #'s 53-2009 and 53-2018. Use mounting kit 992-MK or 992- MK-FW.

2076

4 in. 90 Degree Exhaust Riser
Replaces Mercruiser 12076, Use mounting kit 2076MK, Fits 2.5L and 3.0L engines

$204.95

$120.40

2441

OMC/Volvo Exhaust Manifold, 305-350 Log Style STBD

$244.95

$140.06

Manifold, starboard. Fits 305 - 350 cu.in. GM small block V8 Engines. Includes hose cap and clamp. Replaces OMC #’s 909280 and 912441. Use mounting kit 244-MK.

2442

OMC/Volvo Exhaust Manifold, 305-350 Log Style Port

$244.95

$140.06

Manifold, port. Fits 305 - 350 cu.in. GM small block V8 Engines. Includes hose cap and clamp. Replaces OMC #’s 910144, 909279, and 912442. Use mounting kit 244-MK.

3320

3" Exhaust Riser Extension
Fits 7114B2 center rise exhaust manifold, Replaces Mercrusier 93320, Sold individually-2 required per engine

$94.95

$55.54

3322

6" Exhaust Riser Extension
Fits 7114B2 center rise exhaust manifold, Replaces Mercrusier 93322, Sold individually-2 required per engine

$97.49

$57.11

4354

Exhaust Riser, 4” Outlet w/7 Deg DN Angle-Late MDL

$153.99

$88.19

4” Exhaust Riser outlet, with 7 deg. Down angle. Used on late model I/O's and Inboards. Replaces Merc. 44354, 807914, and 807988. Uses 4354MK mounting hardward kit.

5538

2 1/2 in. Exhaust Riser
90 degree down angle, For Mercruiser Model 160 6 Cylinder In-line 250 cu. in. engines, Replaces Mercruiser 39920 and 55538 risers

$179.95

$104.93

5603

Exhaust Manifold, 3” Log Style, Starboard

$404.95

$237.71

Exhaust Manifold, log style, 3” for Mercruiser models 215, 225, 233, 255, and 888. Fits Ford small block v8 302-351 cu in. engines.

5604

Exhaust Manifold, 3” Log Style, Port

$404.95

$237.71

Exhaust Manifold, log style, 3” for Mercruiser models 215, 225, 233, 255, and 888. Fits Ford small block v8 302-351 cu in. engines.

5639

Swivel Riser
Used on Chrysler LM318, M340, M360, M383, M400, M440 engines from 1968 to 1985

$319.95

$185.19

5805

Exhaust Manifold

$254.95

$148.15

Direct replacement center rise manifold, For Volvo GM V8 307 and 350 cu. in. engines, For Volvo engine models AQ200D, 200F, 225D, 225E, 225F, 255B, 260A, 271A, 280A, 290A, 311A, 225A, 225B, 260A, 260B, & 260C

6325

Exhaust Riser, 3" Outlet w/90 Deg Dn Angle

Fits 2.5L and 3.0L engines. Requires 6325MK Mounting hardware kit to complete installation.

$179.95

$104.93

6351

Exhaust Riser, 3” Outlet w/90 Deg Dn Angle (I/O)

Used on most Inboard/Outboard (I/O) applications.

$148.99

$85.39

6771

Riser, 3" Exhaust Outlet, 0 Degree Down Angle

Used on most Inboard applications.

$244.49

$141.97

7056

Exhaust Manifold (Chris Craft)

$369.95

$209.89

For Log Style Chris Craft V8 283, 302, 305, 307, 327, 350 cu in., Direct replacement water cooled manifold, May need mounting pkg. part no. BCC107686P which includes manifold mounting gasket & mounting bolts

7081

Chrysler Big Block Exhaust Manifold

$399.95

$231.49

Used on Chrysler M383, M400 and M440 model engines

7169

8 in. Riser Extension
For V8 small block 283, 305, 307, 327, and 350 cu. in., For V8 big block 454 and 502 cu. in.

$191.95

$111.10

7296

Stainless Steel Block Off Plate
For Crusader V8 small block 283, 305, 307, 327, and 350 cu. in., For Crusader V8 big block 454 and 502 cu. in.

$13.79

$8.02

7386

Jacketed Upper Swivel Elbow
Fits Crusader big block V-8 454 Engines, Replaces CRU97386

$169.95

$98.76

7387

Lower Swivel Elbow with 3 inch Outlet
Fits Crusader big block V-8 454 Engines, Replaces CRU97387

$83.99

$49.36

7624

Lower Swivel Elbow with 4 inch Outlet
For Crusader V8 small block 283, 305, 307, 327, and 350 cu. in., For Crusader V8 big block 454 and 502 cu. in.

$84.95

$49.36

7752

Exhaust Manifold
Starboard Side, For Crusader V8 small block 283, 305, 307, 327, and 350 cu. in.

$279.95

$164.21

7753

Exhaust Manifold
Port side, For Crusader V8 small block 283, 305, 307, 327, and 350 cu. in.

$279.95

$164.21

7772

4 in. Riser Extension
For Crusader V8 small block 283, 305, 307, 327, and 350 cu. in., For Crusader V8 big block 454 and 502 cu. in.

$189.95

$111.10

7854

90 Degree 1" Npt X 1 1/4" Hose Fitting

$18.49

$10.81

7924

4 in. Exhaust Elbow
For Crusader V8 small block 283, 305, 307, 327, and 350 cu. in., For Crusader V8 big block 454 and 502 cu. in.

$179.95

$104.93

7992

Starboard Side Exhaust Manifold
Starboard side, For Crusader V8 big block 454 and 502 cu. in.

$299.95

$176.55

7993

Port Side Exhaust Manifold
Port Side, For Crusader V8 big block 454 and 502 cu. in.

$304.95

$176.55

8068

3 in. Exhaust Elbow
For Crusader V8 small block 283, 305, 307, 327, and 350 cu. in., For Crusader V8 big block 454 and 502 cu. in.

$169.95

$98.76

8125

Center Rise Exhaust Manifold

$369.95

$216.06

Replaces Crusader # 98125. For Crusader V8 big block Chevy 454 502 CID Models 454XL, 502XL. Necessary pipe plugs are included

8128

Exhaust Spacer, 4" Rise

$169.95

$98.76

Replaces Crusader # 98128. Models CM305, CM350XL, CM350HT, 454XL, 502XL. Use mounting kit 8128-MK. Necessary pipe plugs are included

8243

Crusader Small Block Center Rise Manifold

$349.95

$203.71

8502

Exhaust Manifold Mounting Kit

$169.95

$98.76

8561

Exhaust Elbow and Reservoir

$344.95

$200.62

For Mercruiser 4 cylinder 224 cu. in. 3.7L, Models 165, 170, 180, and 190, Direct replacement for Mercruiser 93174 aluminum manifold and Mercruiser 98561, Cap included, Use mounting kit OSCO8561MK

8759

6 Cylinder Mercruiser Exhaust Manifold

$719.95

$421.37

For Mercruiser in-line 6 cylinder 250 and 292 cu. in., Models 165 and 200. Replaces Merc #58759A10, 58759A13, 58759A14
Use mounting kit OSC8759-MK to mount manifold to cylinder head. Necessary pipe plugs are included

9015

Crusader 4in. Exhaust Riser

$229.95

$135.80

Direct replacement exhaust riser for Crusader big block 454XL and 502XL, Replaces Crusader CRURO29015 and CRU98126, Use mounting kit OSCO9015MK

9234

Swivel Riser
Used on Chrysler M383, M400 and M440 engines

$189.95

$111.10

9745

Mercruiser V6 Exhaust Manifold

$249.95

$144.93

Center rise direct replacement exhaust manifold, For Mercruiser V6 229 and 262 cu. in. 185, 185MR, 205R, and 205MR models, Fits both sides

99204

4” Exhaust Riser, 10 Deg Down Angle

$174.95

$98.76

Replaces Barr # 20-0100. Use mounting kit 992-MK or 992-MK-FW.

1016004

Pipe Plug

$2.49

$1.47

0-188

OMC Riser, 3 3/8" w/90 Degree Down Angle

$189.95

$111.10

Replaces OMC #’s 980020 and 980188. Use mounting kit # 0188-MK.

0402

Exhaust Elbow
For use on Chrysler smallbock 318 and 360 cu. in. motors from 1966-1985 with swivel exhaust

$198.95

$116.05

0879

Exhaust Elbow/Reservoir

$349.95

$203.71

Fits 4 Cylinder 224 cu. in. 3.7L, For Mercruiser models 165, 170, 180 and 190, Replaces Mercruiser 99908 cast iron manifold, Cap included, Fitting not included

0879-MK

Mounting Kit for O879 Elbow/Reservoir

$14.29

$8.33

106

Manifold End Plate
No hole, Used on Chrysler LM318, M340, M360 engines, From 1968 to 1985

$38.95

$22.82

106-T

Manifold End Plate
3/4" IPT hole for water fitting, Used on Chrysler LM318, M340, M360 engines, From 1968 to 1985

$46.95

$27.13

121-MK

End Plate Mounting Kit
Includes gasket and mounting hardware, Used on Chrysler Big Block engines

$12.49

$6.48

2076-MK

Hardware Kit Exh Elbow Bolts

$9.49

$5.53

28001-MK

Manifold to Head Mounting Kit

$23.99

$13.89

For use on PCM small block 302 and 351 cu. in. engines

29001-MK

Riser Mounting Kit
For use on PCM small block 302 and 351 cu. in. engines

$11.69

$6.76

3320-MK

Mounting Kit, Riser - Elbow

$30.49

$17.88

3320-MK-X

Mounting Kit, Riser - Elbow

$36.99

$21.57

3322-MK

Mounting Kit, Riser - Elbow

$12.95

$6.76

4354-MK

Riser Mounting Kit
Includes riser gasket, mounting studs and nuts

$19.95

$11.73

480-MK

End Plate Mounting Kit
Used on LM318, M340, and M360 engines, From 1968 to 1985, Includes end plate gasket and mounting bolts for raw water cooled applications

$9.49

$5.35

480-MK-FW

End Plate Mounting Kit

$11.99

$6.48

Used on LM318, M340, and M360 engines, From 1968 to 1985, Includes end plate gasket and mounting bolts for fresh water cooled applications

50456MK

Mounting Kit For 50456 Riser

$21.99

$12.66

Includes 50456-G gasket and mounting hardware.

52374 (57579)

OMC/Volvo Exh. Manifold Center Rise 305-350 SM BLK

$247.95

$142.46

Fits 305 - 350 cu.in. GM small block V8 Engines. Includes hose cap and clamp. Replaces OMC #’s 914035, 3852374 and VOLVO part # 3852374-2. Fits both sides of engine. Use mounting kit 244-MK. Uses riser number 50456 with mounting kit number 50456MK for riser.

5538-MK

Mounting Kit, Manifold

$10.49

$6.15

560MK

Mounting Kit For 5603 & 5604 Log Style Manif.

$20.99

$12.32

Mounting Kit for 5603 and 5604 Log Style manifolds. Includes mounting gaskets and mounting hardware. (4 short and 4 long bolts)

56879-MK

Riser Mounting Kit
Includes mounting bolts and gasket

$12.49

$7.10

5805-MK

Exhaust Manifold Mounting Kit

$18.95

$11.09

Includes manifold to head gasket and mounting studs

60252-MK

Mounting Kit
Fits 60252 & 54870 Plate

$10.49

$6.15

6325MK

Mounting Kit For 6325 Riser

Includes gasket and mounting hardware.

$10.49

$6.15

6371MK

Mounting Kit For 6351 & 6771 Exh. Risers

$11.79

$6.78

Mounting Kit for 6351 and 6771 exhaust risers. Includes 52076 shown and mounting hardware, not shown.

6371-MK-SP

Mounting Kit, Riser - Elbow

$26.49

$15.40

6562-MK

Crusader Elbow Mounting Kit
Includes elbow mounting gasket, mounting bolts and washers

$13.79

$8.02

7056-MK

Manifold to Head Mounting Kit

$21.49

$11.70

For Log Style Chris Craft V8 283, 302, 305, 307, 327, 350 cu in., Includes manifold mounting gasket & mounting bolts

7081-MK

Manifold to Head Mounting Kit
Used on M383, M400, and M440 engines

$25.95

$14.78

7087-MK

Swivel Elbow Mounting Kit
For use on Chrysler motors with swivel exhaust, Includes mounting hardware, o-rings, and stainless steel sleeve

$52.99

$30.84

7087-OR

O-Ring Set
Used on Chrysler M383, M400, and M440 engines, For swivel elbow applications

$12.99

$7.63

7114B2

Exhaust Manifold, V8 SM BLK Center Rise – Updated

$199.95

$117.57

Fits 305 - 350 cu. in. GM small block V8 engines. Fits both sides of engine. Replaces Mercruiser #’s 87114 and 860246. Updated to replace all small block Mercruiser center riser manifolds to date. Use mounting kit 7214-MK.

7169-MK

Riser Mounting Kit

$52.95

$30.84

Includes riser mounting gasket, mounting studs, washers and nuts. For use with CRU-97169 and OSCO-7169 exhaust risers

7214MK

Mounting Kit For 7235B And BA Manifolds

$16.49

$9.65

Includes mounting gasket and hardware kit w/4 mounting bolts.

7234B

Log Style Manifold, 305-350 SM Block, Port

$379.95

$222.24

GM 305-350 cu in. Log Style exhaust manifold. Requires 7214MK Mounting Kit. Includes mtg gasket and mounting hardware. Use 7234B for port side, use 7235B for starboard side, and use 7235BA for V-Drive applications when the alternator bracket is bolted to the stbd manifold. If Exhaust risers are needed, see 6351 and 6771 for applicable requirement. Replaces Merc. 77234 and 77235 manifolds.

7235B

Log Style Manifold, 305-350 SM Block, Starboard

$379.95

$222.24

775-MK

Mounting Kit, Manifold

$18.99

$11.09

775-MK-A

Mounting Kit, Manifold

$18.99

$10.56

7772-MK

Riser Mounting Kit

$49.95

$30.84

For use with Crusader CRU97772 and OSCO7772 4" exhaust risers

799-MK

Exhaust Manifold Mounting Kit

$19.99

$11.70

For use with Crusader CRU97992, CRU97993 and OSCO7992, OSCO7993 exhaust manifolds

8125-MK

Mounting Kit for 8125 Manifold

$19.95

$11.70

8128-MK

Mounting Kit for 8128 Spacer

$15.49

$17.35

8243-MK

Mounting Kit, Manifold

$18.49

$10.81

826-MK

Manifold to head mounting kit
Used on Chysler model LM318, M340, M360 engines, Used from 1968 to 1985

$22.50

$12.04

826MKSS

Stainless Steel Mounting Kit

$35.95

$20.06

Fits 826 manifold. Includes 826-GH gasket and stainless studs and nuts.

826-SS

Manifold to head attaching stud and nut
Used on Chrysler LM318, M340, M360 engines from 1968 to 1985

$5.49

$3.23

8503A

Exhaust Riser, 3” Outlet w/15 Deg DN Angle-Early ML

$153.95

$88.19

3” Exhaust Riser outlet, with 15 deg. Down angle. Used on early model Mercruiser I/O's. Repl. Merc 98503 and 98504. Uses mounting kit 8053AMK.

8503A-MK

Mounting Kit, Riser - Elbow

$11.69

$6.76

8561-MK

Mounting Kit for 8561 Riser

$18.49

$10.81

8759-MK

Mounting Kit

$38.99

$22.85

9011A

Exhaust Manifold, 4” Center Rise, GM Big Block 454

$279.00

$158.75

Exhaust Manifold, Mercruiser 4”, GM Big Block, 454 cu in. Used on Mercruiser 330, 340, and 7.4L models. Replaces Merc number 89011. Requires mounting kit part number 9011MK. Will use 4354 or 8503A Exhaust Riser as needed for proper installation.

9011A-MK

MOUNTING KIT FOR 9011A

$19.99

$11.70

9015-MK

Mounting Kit, Riser - Elbow

$13.79

$12.68

9745-MK

Mounting Kit, Manifold

$19.99

$11.70

9863-MK

Exhaust Riser Mounting Kit
Includes gasket and riser hardware

$11.19

$6.48

9863T

3-1/2" Exhaust Riser outlet, 60 deg. down angle

$189.95

$111.10

Fits Ford and GM V8 log style manifolds. Replaces OMC 909218, 982680, and 909863. This riser is tapped to accept a 3/4" hose barb.

28001

Exhaust Manifold

$279.95

$164.21

For PCM Ford V8 Small Block 302 & 351 cu. in. engines

29001

Exhaust Riser
For PCM Small Block engines

$147.49

$86.41

54870

Manifold End Plate
End Plate without water fitting. Replaces MerCruiser # 54870. Use OSC60252-MK mounting kit

$30.49

$17.88

56879

Exhaust Elbow

$139.95

$79.18

For Volvo GM V8 307 and 350 cu. in. engines, For Volvo engine models AQ200D, 200F, 225D, 225E, 225F, 255B, 260A, 271A, 280A, 290A, 311A, 225A, 225B, 260A, 260B, and 260C

60207

Stainless Plate

$10.29

$5.98

With weep hole to remove air trapped in the manifold. Fits 6351 and 6771 risers and 5603, 5604, 7234B & 7235B manifolds. Not for use on fresh water/closed cooled systems. Requires (2) 52076 gaskets (one on each side)

60252

Manifold End Plate with Connector
For Mercruiser log style manifolds

$35.95

$20.96

992MK

Mounting Kit, Raw Water Cooling

$11.49

$6.65

Riser and spacer. Fits riser #’s 992, 99204, and 2018 and 994-S3 spacer. Includes; 992-G open gasket and mounting hardware.

992MKFW

Mounting Kit, Fresh Water Cooling

$11.49

$6.15

Fits 992, 99204, and 2018 risers and 994-S3 spacer. Includes 992-G-FW blocked gasket and mounting hardware.

9943-S

3" Exhaust Riser Extension

$129.95

$74.06

Fits OSCO994 and OSCOFL994 exhaust manifolds, Use mounting kit OSCO992MK or OSCO992MKFW

994-MK

Manifold to Head Mounting Kit

$22.95

$12.32

Fits OSCO994 exhaust manifold, Includes gasket and mounting hardware

CRR-1

3 in. Exhaust Riser
10 degree down angle, Use mounting kit OSCOCRRMK or OSCOCRRMKFW

$152.49

$89.49

CRR-2-MK

Mounting Kit, Riser - Elbow

$9.60

$5.92

CRR-4

Riser

$156.25

$72.35

CRR45X3

45 Degree 3" Exhaust Elbow
45 degree cast iron elbow with 6" of 3" I.D. exhaust hose, 4 clamps included

$62.95

$37.02

CRR80X3

EXH ELBOW KIT 80 DEG 3"

$62.95

$37.02

CRR-MK-FW

Riser Mounting Kit
For use with OSCOCRR1 and OSCOCRR3 risers, For fresh water cooling applications

$10.49

$6.15

CVCR-MK

Mounting Kit, Riser - Elbow

$19.99

$11.70

CW994

Exhaust Manifold 4” Outlet, 454 Big Block

$262.95

$154.31

Manifold. Fits 454 cu. in. GM big block V8 engines. Replaces Barr # CHVA-1-84 and Marine Power # 0991-110. Use mounting kit CW994-MK.

FL994

Exh. Manifold, Indmar, Barr, Marine Pwr For Repl.

$245.95

$140.92

Exhaust Manifold, Indmar and Barr, Fits 302 - 351 cu.in. Ford small block V8 engines. Replaces Barr # FM-1-83 and Indmar # 53-2008. Use mounting kit FL994-MK.

FL994MK

Mounting Kit For FL994 Manifold

For Indmar, Barr, Marine Power.

$21.49

$12.32

FLCR818

Exhaust Manifold Assembly

$249.95

$139.90

Fits Ford small block, Fits 221 255 260 289 302 351 cubic inch

MO4-HOK

ADAPTER PLATE KIT

$169.95

$98.76

MWS

Plate, Manifold End

$26.49

$15.40

NWK

Hardware Kit

$14.99

$8.46

OMC643-KIT

Manifold Conversion Kit

$1,674.00

$979.31

Manifold/Riser Kit to replace OMC 4.3L (1) pc, 984221 AND 984222, (1) kit req per eng. This kit comes with (2) each of manifolds, risers, upper and lower bellows and all necessary plugs, bolts, gaskets, and clamps to replace both original OMC Manifolds. Not for use on Vortec engines.

VO418

Volvo 4 Cylinder Exhaust Manifold

$389.95

$228.41

Fits 2.3L and 2.5L Volvo 4 cylinder engines, For Volvo models AQ120, AQ125, AQ131, AQ140, AQ145, AQ151, BB140, BB145, BB230, and BB250

VO-MK

MOUNTING KIT FOR VO418 MANIFLD

$29.49

$17.26