---
product_id: 34460266
title: "H2O T-20903 Replacement Exhaust Manifold, Port, for OMC 909312 and 908488"
brand: "h2o performance parts"
price: "¥120337"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/34460266-h2o-t-20903-replacement-exhaust-manifold-port-for-omc-909312
store_origin: JP
region: Japan
---

# H2O T-20903 Replacement Exhaust Manifold, Port, for OMC 909312 and 908488

**Brand:** h2o performance parts
**Price:** ¥120337
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** H2O T-20903 Replacement Exhaust Manifold, Port, for OMC 909312 and 908488 by h2o performance parts
- **How much does it cost?** ¥120337 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/34460266-h2o-t-20903-replacement-exhaust-manifold-port-for-omc-909312)

## Best For

- h2o performance parts enthusiasts

## Why This Product

- Trusted h2o performance parts brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

H2O T-20903 Replacement Exhaust Manifold, Port, for OMC 909312 and 908488

## Features

- Replaces: OMC part# 909312 and 908488, Barr part # OMC-1-912442 and Sierra part # 18-1903 (Port Exhaust Manifold)
- Fits: Models from 1979 to 1989
- Used in: GM Small Block V8 305-350 cu.in. Engines
- Used with: Riser T-20921 and Mounting Kit 20244-MK
- Backed by a 3 Year Warranty.

## Images

![H2O T-20903 Replacement Exhaust Manifold, Port, for OMC 909312 and 908488 - Image 1](http://ecx.images-amazon.com/images/I/31R6qNJYhQL.jpg)
![H2O T-20903 Replacement Exhaust Manifold, Port, for OMC 909312 and 908488 - Image 2](http://ecx.images-amazon.com/images/I/31PFOG4jh0L.jpg)
![H2O T-20903 Replacement Exhaust Manifold, Port, for OMC 909312 and 908488 - Image 3](http://ecx.images-amazon.com/images/I/318t3f6Uf-L.jpg)
![H2O T-20903 Replacement Exhaust Manifold, Port, for OMC 909312 and 908488 - Image 4](http://ecx.images-amazon.com/images/I/31IpoEqDHgL.jpg)

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**Shop now:** [https://www.desertcart.jp/products/34460266-h2o-t-20903-replacement-exhaust-manifold-port-for-omc-909312](https://www.desertcart.jp/products/34460266-h2o-t-20903-replacement-exhaust-manifold-port-for-omc-909312)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-15*