Impco Technologies F450/F550
Built: 2017 · Series: Other models
More machines from model year 2017
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
IMPCO Technologies – other heavy-duty road engines: the collective page of natural-gas conversions on Ford chassis outside the named ranges, 257 hp from 6.8 litres, E-450 to F-650/750
IMPCO Technologies is a US company that converts vehicle engines to run on gas. This page gathers the heavy-duty road engines the EPA certification register could not assign to a named range. The model designations E-450, F-450/F550, F-650/F750, F450/F550 and Step Van do not refer to IMPCO's own engines but to the Ford chassis for which the conversion was certified; the EPA engine-family codes, such as HZ9XE06.8DC6, uniformly encode a displacement of 6.8 litres, matching Ford's V10 petrol engine fitted to the E-450, F-450/550, F-650/750 ranges and the Step Van chassis.
Read on 3 more paragraphs
The register lists here 5 versions, all with 257 hp rated output at 4,000 to 4,750 rpm, uniformly with sequential fuel injection and compressed natural gas (CNG) as fuel. Maximum torque is 355 Nm on all five versions, also at 4,000 to 4,750 rpm. The version codes G6.8DC6, G6.8DC2 and G6.8DC3 differ only in the last digit; certification in each case covered the US market.
IMPCO uses this range to convert heavy Ford commercial vehicles and vans to natural-gas operation, as used for example in delivery and fleet traffic, smaller refuse trucks, or shuttle and van services; switching to CNG chiefly lowers emissions in inner-city traffic compared with the original petrol engine.
When buying a used vehicle with such a gas conversion, what matters most is the condition of the gas tanks and their inspection intervals, the tightness of the gas lines and fittings, the condition of the valves and valve seats designed for gas operation, and complete documentation of the conversion and its approvals; the underlying engine technology otherwise matches the original 6.8-litre petrol engine. Parts for the gas system run through the IMPCO service network.
Sources: SpecCodex register, model data: IMPCO Technologies (weitere Heavy-Duty-Straßenmotoren)
Technical data
Engine
| Engine code | G6.8DC6correct |
|---|---|
| Engine family | HZ9XE06.8DC6correct |
| Fuel | Compressed Natural Gascorrect |
| Rated output | 191.6 kW (= 257 hp)correct |
| Rated speed | 4,000 rpmcorrect |
| Maximum torque | 355 ft·lbfcorrect |
| Speed at max. torque | 4,000 rpmcorrect |
| Displacement | 6,800 cm³correct |
| Displacement | 6.8 lcorrect |
| Operating cycle | petrol enginecorrect |
| Injection | sequential injectioncorrect |
| Aspiration | naturally aspiratedcorrect |
Origin and approval
| Version | G6.8DC6correct |
|---|---|
| Sales region | USA certificationcorrect |
Other data
| Application | Vocationalcorrect |
|---|
Frequently asked questions
How much power does the Impco Technologies F450/F550 have?
The Impco Technologies F450/F550 delivers 192 kW.
What engine does the Impco Technologies F450/F550 have?
6,800 cm³ displacement, Compressed Natural Gas.
When was the Impco Technologies F450/F550 built?
Production years: 2017.
What to check before buying
- Match the data plate against the order: frame size, mounting and rating have to agree.
- For used units, ask about winding condition and bearing play.
- Ask about parts availability for this series — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 17 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Sources: US EPA — engine certification data (retrieved August 2026) · How we check the data
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