Details
The standard by which all other power valves are measured. QFT's exclusive in-house design has become the power valve of preference by professional race teams in virtually every circuit where carburetors are used. Not only does the FOUR DOOR(R) power valve have a much greater flow capacity, vital for methanol applications, but a quicker response rate and tighter limit bands allow engine builders to precisely tune the power enrichment phase of their calibration. Each FOUR DOOR(R) power valve is hand tested and set to the stamped value. The opening and closing specifications are ½ inch HG above and below the stamped value. The thicker molded diaphragm adds increased protection against backfire induced rupture. This power valve design is covered by U.S. patent # 652,048,8B1.
Hand TestedProduct Attributes
| WARNING CA Proposition 65 | Yes |
| WARNING CA Proposition 65 Message | WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
Extended Product Attributes
| Country of Origin (Primary) | US |
| Emission Code | 1 |
| Harmonized Tariff Code (HTS) | 8409915085 |
| Harmonized Tariff Code (Schedule B) | 8409915085 |
| Life Cycle Status Code | 2 |
| Life Cycle Status Description | Available To Order |
| NAFTA Preference Criterion Code | B |
| National Popularity Code | B |
| National Popularity Description | Next 20% of Product Group Sales Value |
| Part Number - Old | 25-55 |
Product's Extended Description
- Power Valve Assembly; Hi Flow Four Door Power Valve; 5.5;
- The standard by which all other power valves are measured. QFT's exclusive in-house design has become the power valve of preference by professional race teams in virtually every circuit where carburetors are used. Not only does the FOUR DOORr power valve have a much greater flow capacity, vital for methanol applications, but a quicker response rate and tighter limit bands allow engine builders to precisely tune the power enrichment phase of their calibration. Each FOUR DOORr power valve is hand tested and set to the stamped value. The opening and closing specifications are � inch HG above and below the stamped value. The thicker molded diaphragm adds increased protection against backfire induced rupture. This power valve design is covered by U.S. patent # 652,048,8B1.
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