Complete Guide to Vehicle Modification Laws in Alaska
Whether you're building out a lifted truck for the backcountry or just swapping in a new exhaust, it pays to know where Alaska draws the line on vehicle modifications. This guide breaks down the most common mods, what's allowed, and what could get you a citation. The figures below were verified against primary statute text (August 2026), so you can rely on them as a solid starting point before you start wrenching.
Window Tint
Status: Conditional
Alaska allows tinted windows, but the darkness has limits depending on which window you're modifying. Front side windows must allow a minimum 70% VLT. Rear side windows and the back window must allow a minimum 40% VLT each. Darker limits apply behind the driver on some larger vehicles.
Differs by vehicle: For SUVs, trucks, and vans, front side windows still require a minimum 70% VLT, but MPVs and motorhomes are permitted to run darker glass behind the driver under the federal standard.
This falls under 13 AAC 04.223. Check the window tint laws page for the full breakdown.
Lowering
Status: Legal
Alaska has no lowering-specific rule on the books. The state's equipment regulations only address bumper height, and even then only for modified or raised pickups — so lowering your ride generally isn't targeted by a specific statute. This falls under 13 AAC 04. See the lowering laws page for more detail.
License Plate Frames
Status: Conditional
License plate frames are legal in Alaska, and plate covers aren't expressly banned either — but everything on the plate must stay legible. Frames and covers must not obstruct or obscure any portion of the license plate number, letters, or state identification. All plate characters need to remain visible at all times.
This is governed by AS 28.10.171. Full details are on the license plate frames laws page.
Lift Kits
Status: Conditional
Alaska regulates lift height through frame and body floor measurements tied to GVWR class. The frame or body floor max is 24 in up to 4,500 lb GVWR, 26 in for 4,501–7,500 lb, and 28 in for 7,501–10,000 lb. On top of that, the body above the frame is capped at 3 in. There's also a rim line rule: no part of the vehicle except the wheels may sit lower than the bottom of any wheel rim.
This is spelled out under 13 AAC 04.005(b). Visit the lift kits laws page for the complete rule set.
Headlight & Taillight Tint
Status: Illegal
Smoked or tinted film on headlights and taillights is not allowed in Alaska. Film is not permitted on either. Headlights must emit white light, and taillights must show red at the required visibility distance — tint that dims or discolors either one violates those requirements.
This falls under 13 AAC 04.020 and 13 AAC 04.025. See the headlight tint laws page for more.
Wheel & Tire Protrusion
Status: Conditional
Alaska doesn't set a limit on how far tires may protrude from the body. However, every vehicle must have a device that effectively reduces wheel spray and splash to the rear, and that antispray device must extend down to within 14 in of the ground.
This is covered under 13 AAC 04.265. Full specifics are on the wheel & tire protrusion laws page.
Window Banners
Status: Conditional
Alaska permits an "eyebrow" strip along the top edge of the windshield, but it can extend no more than 5 inches down and must be non-reflective. Because the material used for this strip must be transparent, a printed or opaque banner is not legal in Alaska — only a clear tint band qualifies.
This falls under 13 AAC 04.223. Check the window banners laws page for the full rule.
Light Bars & LED Lighting
Status: Conditional
Alaska allows auxiliary lamps to be used on the road, and there's no cover requirement for them. That said, no more than 4 front lights over 300 candlepower may be lit when there is approaching traffic, and spotlights are capped at 2 maximum. Nothing red, flashing, or rotating may show to the front.
This is governed under 13 AAC 04.145. See the light bars laws page for complete details.
Exhaust Noise
Status: Conditional
Alaska doesn't set a statewide decibel limit for passenger cars. Instead, the law requires a muffler in good working order, prohibits exhaust that produces excessive or unusual noise, and bans cutouts or bypasses outright.
This falls under 13 AAC 04.215. Visit the exhaust noise laws page for more.
Underglow
Status: Conditional
Alaska doesn't name underglow lighting specifically, but its general lighting rule still applies to it. No color other than those specified in the lighting chapter may be used, flashing is prohibited, and no red light may be visible from directly in front of the centre of the vehicle. The same front-lamp count rule applies: at most 4 front lights over 300 candlepower may be lit when traffic approaches.
Exceptions & exemptions: The safest approach is to keep underglow unlit on public roads, or restrict it to white/amber light that shows no red to the front and does not flash.
This falls under 13 AAC 04.145. Full details are on the underglow laws page.
Aftermarket Exhaust
Status: Conditional
Replacing your exhaust system is legal in Alaska, but a muffler in good working order is required, and cutouts or bypasses are prohibited. Modifications that make the exhaust louder than the originally installed muffler are also prohibited.
Exceptions & exemptions: The muffler must prevent excessive noise. Catalytic converter tampering is prohibited on emission-controlled vehicles, and removal of the catalytic converter is prohibited by federal law. No bypass valves or cutouts are allowed that would circumvent emission controls.
This falls under 13 AAC 04.215. See the aftermarket exhaust laws page for the complete rule.
Every modification above links to its full law page with exact limits, statute citations, and exceptions — or browse every Alaska mod law in one place, free.
This guide is for informational purposes only. Data is AI-extracted from public statutes and may contain errors. Always verify with local authorities.