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177 Fulford Dr.
Harkers Island, NC 28531
(252) 504-3355
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Manifold, Exhaust Kit, Mercruiser GM 7.4L-454, 8.2L-502 V8 4"


  • Part #: HGEBB4MER

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Exhaust Manifold Kit for Mercruiser, Marine Power Big Block V8 454/502 CID Center Riser with 4 Inch exhaust. Used on most 454 7.4 Liter engines 1987 and later. 4 Inch means the exhaust hose size that fits the riser is 4 inch inside diameter.
This kit requires a 4" I.D. Exhaust hose to be connected to the riser.

This kit includes:

2 - HGE # 4354 4" Risers
2 - HGE # 9011 Manifolds
Cross Reference Component Part Numbers
Mercruiser Manifold: 807078A6, 89011A8
Riser: 807988A2, 44354A3
Osco Manifold: 9011
Riser: 4354
Barr Manifold: MC-1-89011
Riser: MC-20-44354X
GLM Manifold: 51240
Riser: 51140
Sierra Manifold: 18-1957-1
Riser: 18-1976-1
Mallory Manifold: 9-40506
Riser: 9-40559
HGE Manifold: 9011
Riser: 4354
Cast Iron Manifolds and Risers come with a 3-year limited warranty!

Extra Shipping applies for Manifold/Riser Kits: $59 for states east of the Mississippi, $79 for states west of the Mississippi
Shipping outside of the contiguous US will be sent by email after the order is placed

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