Only the specifically identified generation receives the continuation approval. Approval does not automatically extend to a successor generation using the same model name. Additional continuation models may be approved by the GTA Rules Committee.

Specific Vehicle Eligibility

BMW E46 M3 — PERMITTED — The BMW E46 M3 is specifically permitted, subject to all other Import Masters rules.
BMW E9X M3 — PROHIBITED — The E90/E92/E93 BMW M3 is not eligible regardless of model year.
Nissan 350Z (Z33) — PERMITTED — The Nissan 350Z and older otherwise-eligible Nissan Z platforms are permitted.
Nissan 370Z (Z34) — PROHIBITED — The Nissan 370Z is not eligible regardless of model year.
Nissan GT-R (R35) — PROHIBITED — The Nissan GT-R R35 is not eligible regardless of model year.

Additional excluded vehicles include the Acura NSX 2G, Porsche GT models, factory race-derived specialty vehicles, and other vehicles determined by GTA Staff to be supercars, hypercars, exotics, limited-production or specialty vehicles.

Chassis / Exterior / Aero

A.1  Full carbon-fiber or other lightweight-material replacement bodies are not permitted. Only bolt-on components, including bumpers, fenders, hood and trunk, may be made from alternate materials. These components must retain OEM fitment and mounting, with allowances for additional hood and trunk retention hardware. Doors must remain OEM.
A.2  The OEM tub/chassis, structure and protection must remain intact and may not be modified, including the entire shell and welded-on components, except as necessary for roll-cage installation, seat mounting and tire clearance when flares or overfenders are used.
A.3  Front core supports may be trimmed or modified to fit upgraded cooling components.
A.4  Shock towers may be modified only as necessary to install camber/caster plates and obtain the required camber and caster adjustment.
A.5  OEM suspension pickup points may not be modified, except for permitted camber adjustment on non-MacPherson-strut vehicles.
A.6  Stock/OEM wheelbase must be retained.
A.7  Front air dams, lips, splitters and diffusers may not extend more than 5 inches beyond any portion of the bodywork in any direction when viewed from above. Splitters may extend rearward only to the centerline of the front wheels. Diffusers may extend forward only to the centerline of the rear wheels.
A.8  Barge boards may protrude inward only to the chassis pinch weld and may extend a maximum of 3 inches outward when viewed from above. They may extend forward and rearward only to the inboard edge of the wheel openings.
A.9  Seam welding is permitted. No additional material other than weld material may be added.
A.10  Flat-bottom floors are prohibited between the front and rear wheel centerlines unless factory installed and using OEM components.
A.11  The rear wing may not be the highest point on the vehicle. End plates and swan-type supports may extend up to 3 inches above the roofline. OEM duckbills may be retained and may be used for wing mounting on hatchbacks and wagons only. Exceptions may be allowed for hatchbacks and wagons that have no rear deck suitable for wing mounting.
A.12  Hatchback roof-mounted wings may not extend more than 14 inches above the roof.
A.13  No portion of a wing or duckbill may extend more than 5 inches rearward of the rearmost point of the bodywork when viewed from above.
A.14  A wing may be no more than 5 inches wider per side than the widest part of the body, excluding mirrors.
A.15  A maximum of four canards is permitted. Canards must be mounted entirely forward of the front wheel and tire assembly and may project a maximum of 5 inches from OEM bodywork.
A.16  Active aerodynamic devices are prohibited.
A.17  Only one rear wing/spoiler is permitted, including OEM or aftermarket spoilers, except on vehicles originally equipped with two rear spoilers, such as the FK8 Type R and GD STI. Dual-element wings are prohibited. A dual-element wing may be rendered a single element by securely taping the elements together with heavy-duty tape that will remain in place during the session. If the tape comes off during a session, that session is subject to disqualification.
A.18  Polycarbonate/Lexan replacement windows are prohibited unless part of an aftermarket hard/soft top or originally equipped by the manufacturer. Engine covers on mid-engine cars may be polycarbonate provided OEM glass remains between the engine compartment and passenger area.
A.19  Aftermarket fenders, overfenders and fender flares may be installed on OEM fenders. Rear OEM fenders may be modified only as necessary for tire clearance. On vehicles with bolt-on rear fenders, the complete rear fender may be replaced with an aftermarket fender. Parts may be bolted, riveted, welded or bonded.
A.20  Front fenders may be trimmed or vented for aerodynamic purposes.
A.21  Rear diffusers may protrude no more than 5 inches from the rear bodywork in any direction when viewed from above.
A.22  The stock/OEM roof line must be retained. Roof-mounted canards and shark fins are prohibited.
A.23  Welded-in components are allowed to correct common failure points in older chassis cars.
A.24  Glass roof panels or sunroofs may be replaced with alternate materials.

Engine / Drivetrain / Fuel

B.1  Only one internal-combustion engine is permitted per vehicle.
B.2  Engine modifications are open except where specifically restricted by these rules. There is no horsepower limit.
B.3  Pushrod engine designs are prohibited. This restriction applies to engine design and does not refer to suspension design.
B.4  Engine swaps are permitted only with prior approval from the GTA Rules Committee. All swaps must remain consistent with the intent of Import Masters.
B.5  V8 engines are prohibited. No vehicle competing in Import Masters may use a V8 engine, whether factory-installed or engine-swapped.
B.6  Relocation of the engine and/or transmission is limited to 2 inches in any direction from the OEM location. When an engine and/or transmission swap is performed, the replacement engine and/or transmission must be installed as close as possible to the OEM location. The fore/aft center of a swapped engine may be no more than 2 inches rearward of the original engine center.
B.7  Sequentially shifted transmissions are prohibited.
B.8  OEM DCT/DSG transmissions are permitted only when originally equipped in the eligible vehicle/platform. DCT/DSG transmission swaps into vehicles not originally equipped with that transmission type are prohibited.
B.9  ZF 8HP transmissions are prohibited.
B.10  Drivetrain changes are prohibited. FWD-to-AWD, AWD-to-RWD and other drive-wheel configuration conversions are not permitted.
B.11  Only gasoline, diesel and ethanol blends are permitted as primary fuel. Methanol, nitromethane, RC fuel and equivalent exotic fuels are prohibited. Auxiliary water/methanol injection is permitted.
B.12  Only one power adder is permitted in the Boosted division. Turbocharging, supercharging or nitrous oxide may be used individually, but different types of power adders may not be combined. Multiple turbochargers are permitted and are considered one turbocharging power adder.
B.13  Examples of permitted Boosted combinations include a single turbocharger, twin or multiple turbochargers, a supercharger, or nitrous oxide used independently. Prohibited combinations include turbocharger plus nitrous, supercharger plus nitrous, turbocharger plus supercharger, or any other combination of different power adders.
B.14  Vehicles competing in Naturally Aspirated may not use turbocharging, supercharging, nitrous oxide or another power adder.
B.15  Nitrous oxide systems, when permitted in the Boosted division, must use appropriate mounting and a blow-down tube.
B.16  Hybrid or electric drive is permitted only in full OEM physical form with no physical modifications to the drive or control systems. Programming, tuning and battery upgrades are permitted.
B.17  Exhaust must exit behind the front axle, with allowances for external wastegate dumps. If exhaust exits upward or in front of the driver, a helmet respirator system is required.

Suspension / Brakes / Tires / Wheels

C.1  Tire brand is open. Tires must be DOT-approved treaded tires with a minimum UTQG rating of 60 or higher.
C.2  Aftermarket suspension control arms must retain stock geometry and mounting points, except commercially available alignment-correction components may be used.
C.3  Aftermarket or modified uprights, spindles and knuckles are prohibited.
C.4  Adjustable shocks/dampers may have no more than two-way damping adjustment.
C.5  In-car driver-adjustable suspension or sway bars are prohibited unless OEM.
C.6  Sway bars or links may not be mounted in or pass through the vehicle interior unless OEM.
C.7  Classic and vintage vehicles with body-on-frame construction and/or front-subframe-encapsulated suspension may update to commercially available off-the-shelf modern suspension.
C.8  Active suspension is prohibited unless OEM.
C.9  Tire warmers are prohibited.
C.10  Aftermarket subframes are prohibited.
C.11  No part of the top of the flat tire tread may protrude past the widest point of the wheel arch, fender, quarter panel or flare when viewed from above at the wheel centerline.
C.12  Brake components are open provided the vehicle continues to comply with the applicable chassis, wheel and GTA Safety Minimum requirements. Brake pads or shoes must not be more than 85% worn during competition; brake fluid must be clean and full; at least one brake light must function; there may be no brake-fluid leaks; and rotors/drums must be free from cracks.

Interior / Roll Cage / Safety / Misc.

D.1  Import Masters vehicles must meet GTA Safety Level 1 at minimum, plus the class-specific requirements below. Competitors may install safety equipment exceeding the minimum.
D.2  Interior components may be removed. The majority of the OEM dashboard panel, or a reasonable facsimile, must be retained but may be trimmed for clearance. The shift-lever surround, center armrest, radio, headliner and carpet may be removed.
D.3  Doors may be gutted only when a six-point roll cage with proper side-impact protection is installed. If the OEM door structure and side-impact protection are retained, interior door trim may be removed.
D.4  Roll cages are not permitted to penetrate the firewall or mount to plates that penetrate the firewall. No more than six cage mounting or attachment points are permitted.
D.5  Roll-bar-to-chassis gusseting and chassis gusseting are prohibited.
D.6  Factory-original or better driver seats must be securely mounted. An OEM or reclining seat must use a minimum three-point belt mounted as originally equipped. OEM two-point lap belts and aftermarket four-point harnesses are prohibited.
D.7  A fixed-back race seat requires an SFI-, FIA- or equivalently rated five- or six-point harness with proper mounting, routing and wrapping. Shoulder harnesses must attach to a cage or harness bar at no more than 15 degrees above or below horizontal. Sub belts must be anchored at center mass or behind the driver. Side belts must attach to the chassis or floor side of the seat bracket unless OEM.
D.8  Any roll bar or cage component that may be contacted by the driver’s head must be padded.
D.9  Vehicle safety must allow the driver to exit quickly in an emergency. GTA may require an exit test of 15 seconds or less with the driver wearing complete safety gear and tightly harnessed in the normal driving position.
D.10  All vehicles must have a fire extinguisher within reach of the driver or an approved onboard fire-suppression system. The extinguisher must be securely mounted with a metal quick-release bracket.
D.11  All vehicles must have functional front and rear tow-hook/tow points.
D.12  OEM glass is required in all positions unless an allowance is specifically stated elsewhere in these rules. Front door windows must be fully down while on track. Engine covers on mid-engine vehicles may be polycarbonate provided OEM glass remains between the engine compartment and passenger area.
D.13  Headlights, taillights and mirrors must be installed in OEM locations, road legal and in working condition.
D.14  The battery must be securely mounted and the positive terminal insulated. Wet-cell or spill-type batteries must be mounted in a spill-proof container.
D.15  All fluids must be at correct levels. Fluid caps must be tight and secure, overflow containers must be present where required, and the vehicle may not leak fluids.
D.16  Belts and hoses must be in good condition. The exhaust system must be securely mounted and free of leaks. The throttle must have a quick, positive return.
D.17  Tires must be in good condition with adequate tread and speed rating. All wheel fasteners must be present and torqued to specification. Unsecured wheel cosmetic accessories must be removed. Wheels may not have cracks or structural damage.
D.18  Wheel bearings may not have play. Ball joints must be in good condition. Steering may not have excessive play. Shocks and struts may not leak.
D.19  Glass may not have severe cracks in the driver’s line of sight. Outside and rear-view mirrors must be secure and free of cracks. Cameras and recording devices must be securely mounted.
D.20  Driver helmet must be Snell SA2010 or newer. M-rated helmets may be used but are not recommended.
D.21  Convertibles must have a roll bar meeting GTA Safety Level 2 material and construction standards unless the vehicle has documented factory-installed rollover protection recognized by GTA. T-top and targa-top cars are not considered convertibles for this requirement.
D.22  Vehicles with aftermarket fuel tanks or fuel cells must meet the minimum FIA FT3 or SFI 28.3 fuel-cell, fuel-line and fire-extinguisher requirements contained in the GTA Safety Minimums.
D.23  Professional drivers are prohibited. A professional driver is anyone paid to drive a race car in a professional racing series, a paid test driver for a professional racing team, or a person paid to instruct professional race drivers. Club-level SCCA/NASA and public driving-school instructors are not considered professional drivers solely because they are compensated for instruction.

GTA General Rules: GTA General Rules
GTA Safety Minimums:  GTA Safety Minimums
Please address technical questions to rules@globaltimeattack.com