Mercruiser exhaust manifold V8 conversion kit GM

5.0L / 5.7L 305/350 GM manifold with risers, bellows, gaskets

Last updated on 11/7/2023

Conversion kit for Mercruiser GM V8 models
Change from older log style to newer style 2 piece center rise style
Includes all hardware require for converting, and spacers are also available
Manufactured by GLM Marine with a 3 year warranty
Mercruiser Exploded View Outdrive Drawings click here
Increased water cooling area over OEM model

58990 Mercruiser exhaust conversion kit V8

P/N 58990 Complete conversion kit with 4 inch riser. *Note – not compatible with engines with high mounted power steering pumps.

$1699 US

$ 3,098.89 CDN

Included

P/N 13222 Thermostat housing kit
P/N 13030 Thermostat / 807052T1
P/N 47180 Water hose
P/N 89120 Upper bellow / 32-44348T x 4
P/N 01100 Hose clamp / 54-815504372 x 16
P/N 50770 Tube x 2
P/N 01057 Small hose clamp x 8
P/N 50011 Solenoid bracket
P/N 22303 Screw x 2
P/N 50012 Fuel filter bracket P/N 21026 Spacer
P/N 22371 Screw / 331999
P/N 74009 Alternator bracket / 93175T
P/N 21695 Spacer for alt. bracket / 23-33186
P/N Screw 22355 / 10-12244 x 3
P/N 51230 Cast iron exhaust manifolds Mercruiser OEM number 860246Q11 x 2 units
P/N 51110 Elbow – riser OEM number 98504A3 or
P/N 51140 Mercruiser OEM number 807988A2 Elbow – riser (3 inch or 4 inch) x 2 units
P/N 31100 Gasket / 27-33395 x 2
P/N 30240 Gasket / 27-863724 x 2
P/N 13991 90 degree hose fitting / 22-806926 x 2
P/N 13992 Drain plug / 22-806608A02 x 2
P/N 80140 O-ring for plug / 25-45253 x 2
P/N 22391 Stud / 16-49545 x 8
P/N 21248 Locknut / 11-46335 x 8

Customers who purchased P/N 58990 also looked at:

Photo

Description / OEM #

Price (USD)

Price (Canadian)

51230

P/N 51230 V8 Exhaust manifolds assembly for port and starboard 305/350 V8 center rise.
Comes with exhaust manifolds gaskets and drain plug.
2 Manifold and risers may be required.

Mercruiser exhaust parts included:

P/N 13992 Drain plug
P/N 31100 Gasket for exhaust manifolds
P/N 30240 Gasket for Manifold and risers

$190.95

$ 363.89

30240-31100

P/N 31100-30240-2 Replacement gasket set. 2 exhaust gaskets and 2 riser gaskets.

$21.95

$ 17.89

12110 Water pump

P/N 12110 Sterndrive water pump impeller kit for MC-1, R models 1970-1983, serial numbers 2763442-6854392.

$39.95

$ 66.89

15201 V6-V8 Engine water pump

P/N 15201 Engine water circulating water pump for Chevy/GM V6 and V8 small block.
850399-1

Compatible with

229 CID-3.8L
262 CID-4.3L
305 CID-5.0L
350 CID-5.7L

$96.95

$127.89

21950 Transom service kit

P/N 21950 Complete Mercruiser bellows kit click here. Compatible with 1973 – 1990, serial numbers 3469428 – 0D469858 MC-1/R/MR and Alpha One models.

30-803097T1

Includes
P/N 21905 / 30-60792A4 Gimbal Bearing
P/N 39622 / 27-94996T2 Gasket Kit
P/N 47110 / 32-41725-33 Water Hose 3/4”
P/N 47120 / 32-32461 Water Hose 5/8”
P/N 89050 / 60932A4 U-Joint Bellow
P/N 89080 / 74639 Shift Cable Bellow
P/N 89100 / 18654A1 Exhaust Bellow
P/N 85910 / 26-88416 Oil Seal