Direct Replacement Manifold (Mercarb) 6 bolt Mounting Pattern No Choke Stove, Mercruiser, MC-1-99798

★★★★★ 4.6 48 reviews

$531.97
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Management number 204555000 Release Date 2025/10/30 List Price $159.59 Model Number 204555000
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Quality built replacements for your rusty or cracked Mercruiser Exhaust Marine Manifold (Part No. 99798A9) on your 153 and 181 CID Chevrolet Engine with a Direct Replacement Mercruiser 120 & 140 HP Exhaust Manifold, MC-1-99798. Barr exhaust manifolds are built for the marine environment and are easy to install. Manifolds by Barr are covered by a manufacturer's 3-year warranty. It is recommended that replacement manifolds be done in pairs and to also replace the risers and elbows at the same time.

Made in the USA

    Fits MerCarb 3-11/16" x 2" bolt pattern
  • Replaces Mercruiser # 99798A9
  • Manifold includes mounting hardware, gaskets and plugs
  • Fits Mercruiser 120R/140R MR/Alpha 1 engines
  • For Mercruiser 4 cylinder 153 cid (120hp, 2.5L) & 181 (140 hp, 3.0L) w/ Mercarb carburetors


Get back that new boat feel! Barr Manifolds are designed to reduce back-pressure and often when replacing OEM-installed manifolds, more horsepower is achieved.

When choosing a Manifold, it is recommended to also choose the appropriate new risers / elbows. Although Manifolds such as Barr, Osco and others including original equipment often look alike, it is recommended to buy manifolds and risers as sets. Where applicable, buy replacement manifolds in pairs a

View Complete Barr Catalog


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