# Exhaust Riser Extension 5" - Cast 316 (HDI GMR5)

5" 316 Stainless Steel Extension Riser

Suitable for Yanmar 1GM, 1GM10, 2GM, 2GM20, 2GM20F, 2GM30, 2GMF, 3GM, 3GM30, 3GM30F, 3GNF, 3HM, 3HM35F, 3HMF

Extends exhaust intake port by 4 inches.

Overall length of this product is 5 inches

Heavy wall 316 Stainless steel

1-1/2 BSPT thread LH / RH

Fits Mixing Elbows:

GM / GMP / GML / GM2 / JHL

For exhaust Blanket go to **HDI MATR5**

This is a HDI Marine part HDI GMR 5.

## Details

- **Price:** 101.2 AUD
- **Vendor:** HDI Marine
- **Tags:** Sawley’s AAM Aftermarket – Exhaust Elbows Mixers & Risers – Yanmar HDI | Marine Exhaust Elbows Risers & Mixing Elbows

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 101.20 AUD | In stock |

## Images

- Exhaust Riser Extension 5" - Cast 316 (HDI GMR5)

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/exhaust-riser-extension-5-cast-316-hdi-gmr5)
> Updated: 2026-06-23