# Exhaust Riser Extension 7" - Cast 316 (HDI GMR7)

7" 316 Stainless Steel Extension Riser

Suits Yanmar Mixing Elbows:

1GM / 2GM / 3GM / 1GM10 / 2GM20 / 2GM30 / 2GM20F / 3GM30F / 3GM30 / 3HM / 3HM35F / 2GMF / 3HMF / 3GNF / 3JH5E / 3JH3E / 4JHE / 4JH2E / 4JH2CE / YSM12 / 2YM-15 / 3YM-30 / 2QM15 / 2QM20 / 3QM30

  

Extends exhaust intake port by 6 inches.

Overall Length of this product is 7 inches.

1-1/2 BSPT thread LH / RH

Fits Mixing Elbows: GM / GMP / GML / GM2 / JH

For Blanket insulation go to **MATR7**

This is a HDI (USA) marine part R7.

## Details

- **Price:** 115.0 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 | 115.00 AUD | In stock |

## Images

- Exhaust Riser Extension 7" - Cast 316 (HDI GMR7)

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/exhaust-riser-extension-7-cast-316-hdi-gmr7)
> Updated: 2026-06-23