Heavy Duty Trucking Logo
MenuMENU
SearchSEARCH

EPA Will Not Enforce 300-Unit Limit on Glider Kits Through 2019

The Environmental Protection Agency said it will not enforce for 2018 and 2019 a 300-unit production cap put in place on the manufacture of glider kits that do not comply with Phase 2 GHG emission rules.

David Cullen
David Cullen[Former] Business/Washington Contributing Editor
Read David's Posts
July 9, 2018
EPA Will Not Enforce 300-Unit Limit on Glider Kits Through 2019

EPA will not enforce for 2018 and 2019 a 300-unit cap on the manufacture of glider kits.

Photo: Tom Berg

3 min to read


The Environmental Protection Agency said it will not enforce for 2018 and 2019 a 300-unit production cap put in place on the manufacture of glider kits that do not comply with Phase 2 GHG emission rules.

EPA said the action is being taken because it is working to finalize a proposed rule to repeal “certain emission requirements” on glider kits that were imposed under the Phase 2 rules, which were put in place in 2016. News of the enforcement loophole was broken by The New York Times one day after theresignation of EPA Administrator Scott Pruitt on July 5.

Ad Loading...

EPA Press Secretary Molly Block told HDT on July 9 that back in November, the agency proposed to “repeal certain emission requirements for gliders. This proposal also contemplated as alternatives or additional measures an extension of compliance deadlines, and raising the cap on the number of gliders allowed to be built by small manufacturers.” (Per Block, a “small” manufacturer is one defined as such by the Small Business Administration.)

In July 2017, after Fitzgerald Glider Kits petitioned EPA to do so, the agency announced it intended to revisit the Phase 2 glider kit provisions. In November, the agency issued its official proposal to entirely repeal emission requirements for glider vehicles, glider engines, and glider kits.

The repeal proposal came out only weeks before the 300-unit glider cap was to take effect on Jan. 1 of this year, which is the driving factor behind the newly announced enforcement pause.

Ad Loading...

“The [Phase 2] requirements in question first took effect in January 2017, and limit the number of new glider vehicles that small manufacturers can produce and sell without being subject to additional requirements,” stated Block. “The limit took effect in two stages. In 2017, small manufacturers were limited to the number of gliders they built in their biggest production year between 2010 and 2014. In 2018, small manufacturers are limited to no more than 300 gliders" by the rule.

She said EPA took into consideration “public comments received as well as engagement with stakeholders” before determining that “additional evaluation of a number of matters is required before it can take final action on one or more aspects of the [repeal] proposal."

However, it should be noted that, per The Washington Post, a Sept. 11 letter to then-EPA chief Pruitt urged him not to revisit the rule, contending that glider kits “should not be used for circumventing purchase of currently certified powertrains.” The letter was signed by executives from Volvo Group North America, Cummins, and Navistar. The companies noted that they were joining the Truck and Engine Manufacturers Association, the American Trucking Associations, and the Truck Rental and Leasing Association in supporting the Phase 2 mandate as written.

“Until a final rule can be completed to bring regulatory certainty to glider manufacturers,” Block stated, “the agency is considering interim steps to reduce severe impacts on the industry. First, EPA is considering an extension of the compliance date, which would set a new effective date of Dec. 31, 2019. And, second, the agency is exercising its enforcement discretion in 2018 and 2019 for small manufacturers who limit production to the interim cap provided in 2017.”

The decision to not enforce the existing Phase 2 limits on glider kits means that, for at least the next two years, a manufacturer may produce as many gliders as it did during its biggest production year between 2010 and 2014. 

Ad Loading...

More Equipment

2026 Mack Granite interior.
Equipmentby News/Media ReleaseJune 11, 2026

New Mack Granite Cab Puts Driver Comfort Front and Center

Mack’s next-generation vocational truck features a roomier cab, premium seating, advanced steering technology, and a driver-focused interior designed with direct input from professional operators.

Read More →
Mack Trucks Pioneer Nascar Salutes truck.
Equipmentby News/Media ReleaseJune 11, 2026

Mack Unveils Fan-Selected Patriotic NASCAR Pioneer Wraps

Racing fans picked the patriotic design now featured on three Mack Pioneer trucks hauling NASCAR equipment across the country during the 2026 season.

Read More →
Michelin X Line Grip D tires.
Equipmentby News/Media ReleaseJune 9, 2026

Michelin Expands X Line Grip D Tire Line

Michelin is expanding its X Line Grip D drive tire lineup with a new pre-mold retread and additional sizes, building on what the company says is strong fleet adoption of the tire's traction, mileage, and fuel-efficiency benefits.

Read More →
Ad Loading...
Illustration of SCR/DEF system on heavy-duty truck
Equipmentby News/Media ReleaseJune 4, 2026

Engine Technology Forum Launches SCR, DEF Resource Center Amid Emissions Debate

The Engine Technology Forum’s new online hub aims to provide fleets, policymakers, and equipment owners with fact-based information about selective catalytic reduction technology, diesel exhaust fluid and emissions compliance.

Read More →
Artist rendering of dealership with trucks and trailers parked outside
Equipmentby News/Media ReleaseJune 2, 2026

Prime Inc. to Open $7.9M Flagship Used-Truck Dealership

A new driver-focused facility to sell Prime Inc's used trucks and trailers will be the first purpose-built location in the company's history.

Read More →
Red Kenworth truck pulling Paper Transport trailer
Fuel Smartsby Deborah LockridgeJune 2, 2026

Lessons Learned About Alternative Fuels: Start Small, Stay Flexible

Practical advice on adopting alternative fuels and ZEVs from HDT's 2026 Top Green Fleets, from renewable diesel and natural gas to electric trucks.

Read More →
Ad Loading...
Kenworth T680.
Equipmentby News/Media ReleaseMay 27, 2026

Kenworth Names Peter Ahrens General Manager

Leadership changes at Kenworth take effect July 1 as the OEM promotes two longtime Paccar executives to key management roles.

Read More →
White Hino Le electric tractor on show floor
Equipmentby News/Media ReleaseMay 26, 2026

Hino Adds Electric Class 6/7 Truck

Hino says the Le Series is an important step in the company's efforts to reduce environmental impact and support its customers’ sustainability goals.

Read More →
Big standing "ACTExpo" sign in convention center lobby
Equipmentby Deborah LockridgeMay 26, 2026

ACT Expo 2026: Highlights in Photos

The 2026 Advanced Clean Transportation Expo featured a broad range of commercial vehicle technologies, from EVs to autonomous trucks to the latest diesel and alternative-fuel engines.

Read More →
Ad Loading...
Red Hendrickson e-axle at ACT Expo booth
Equipmentby News/Media ReleaseMay 22, 2026

Hendrickson Debuts Electraax E-Axle for Medium-Duty Trucks

Developed with Driventic, Hendrickson's new integrated e-axle is designed to improve efficiency, reduce weight, and extend range in Class 6-7 EV applications.

Read More →