# Cummins 6BT, 6BTA Heat Exchanger 4019958CN 4x25 Replacement Part (3914642)

Cummins 6BT, 6BTA Heat Exchanger 4019958CN Replacement

Suits Cummins 6BT 250hp later models and Cummins 6BTA 300hp.

Replaces Cummins 4019958, 3866719 and 3914642 heat exchangers.

4" Diameter x 25-3/4" Bundle Length.

Copper nickel (CUNI) for superior erosion resistance in salt water applications.

This is a non-OEM, aftermarket part MEC 4019958 CN. / MEC3914642CN.

Boxed weight 15kg. 35x35x95

Anode - 1/2" BSPT x 1-1/5" L You can use Anode Z9-036 you need to shorten the anode by 10mm

## Details

- **Price:** 2461.0 AUD
- **Vendor:** Mr Cool
- **Tags:** Sawley’s AAM Aftermarket – Cooling Systems Mr Cool | Marine Heat Exchangers & Kits

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2461.00 AUD | In stock |

## Images

- Cummins 6BT, 6BTA Heat Exchanger 4019958CN 4x25 Replacement Part (3914642)
- Cummins 6BT, 6BTA Heat Exchanger 4019958CN 4x25 Replacement Part (3914642)
- Cummins 6BT, 6BTA Heat Exchanger 4019958CN 4x25 Replacement Part (3914642)
- Cummins 6BT, 6BTA Heat Exchanger 4019958CN 4x25 Replacement Part (3914642)

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/cummins-6bt-6bta-heat-exchanger-4019958cn-4x25-replacement-part-3914642)
> Updated: 2026-06-23