REFERENCE MT120N TWEETER FOR A-PILLARS
Almost every panel we make will not need cutting to use these speakers. Want to keep your car unmolested with the best sound possible? This is the speaker for you.
This is a slim tweeter that will drop right in all our A-Pillars.
The new generation MT-120 tweeter offers unrivalled high frequency performance in a compact design with incredible high power handling capabilities at very low distortion levels. While its size allows it to be fit in most factory locations, surface and flush mount options with a beautiful lotus grille provide an elegant look fitting for modern vehicles.
BUILDER TRUSTED.
Kevin Schiele, shop foreman at Kindig-It Design and co-host of MotorTrend's Bitchin' Rides, on Fesler flush-mount glass. Kindig-It has been building world-class custom rides out of Salt Lake City for 25+ years.
EVERYTHING YOU NEED TO INSTALL RIGHT.
A real talk on fitment, install timing, and what separates a clean Fesler bond from a fight with your installer. Read this before you order, and again before you cut tape on the crate.
FITMENT, STRAIGHT TALK.
Our glass is engineered and manufactured by Pilkington, an OEM glass producer that supplies new vehicles sold today. Same float-glass process. Same tolerances. Made on the same kind of production line that builds glass for modern cars rolling off dealer lots right now. This is real automotive glass, not import stock resized to approximate fit.
On a properly prepared body, it drops in. The reality with classic cars: these vehicles are 50 to 70 years old. Decades of accidents, racing, repaints, and subtle sheet-metal shifts mean some openings have moved over time. The glass is the constant. Your car's opening is the variable. Minor adjustment or light bodywork is occasionally part of a real classic build, and that's true for any precision part going on a 60-year-old car.
Best results come from planning glass into the bodywork phase, not after final paint. If you skip that window and bond glass to a body that needs work, you're asking the glass to do something it was never engineered to do.
WHERE ARE YOU IN YOUR BUILD?
Build timing matters. Here's a quick read on where flush-mount glass fits into your build sequence, and what to expect at each stage.
Just Starting
Shell on the rotisserie, planning the build. Order your glass now and bring it into your bodywork plan. The opening can be massaged to spec while the body is still in metal stage.
In Bodywork
Doors and fenders hung, panels gapped, primer or pre-paint stage. Test fit your glass now, identify any opening corrections, and address them before final paint goes down.
Painted, Build Nearly Done
Body and paint complete, working through interior and final assembly. Test fit early. If the opening needs adjustment, you'll want to address it before bonding glass to fresh paint.
THE 12-STEP INSTALL AT A GLANCE.
Full Walkthrough →PREP & REMOVE
Protect the vehicle, remove the original glass, clean the channel down to bare metal, and remove the factory clips. The four steps before any new glass touches the body.
TEST FIT & BOND
Test fit with 3/8" fuel line, clean the new glass, prime the frit band, lay urethane, and set the windshield. The make-or-break sequence that determines fitment, seal, and final reveal.
CURE & FINISH
Support the glass through overnight cure, then optionally fill the body gap with weatherproof silicone for a clean, debris-free finished look. Don't drive or pressure-wash early.
CRITICAL INSTALL RULES
- Always urethane, never butyl. Urethane systems hold 600+ psi. Butyl holds 60. There is no comparison.
- Use proper urethane primer. Prime the frit band and let it dry. Skipping primer puts your windshield at risk of slipping loose.
- No glass cleaner on the bond area. Standard glass cleaner reacts with urethane primer and prevents proper bonding.
- Test fit before bonding. Use 3/8" fuel line in the channel to simulate urethane and verify fit and gap before commiting.
- Never touch primed surfaces. Skin oils prevent urethane from sticking. Apply, let it dry, leave it alone until you set glass.
- Cure overnight before driving. Don't drive or pressure-wash for 24 to 48 hours minimum after install. Refer to your urethane manufacturer's spec.
FOR PRO INSTALLERS Recommended
We strongly recommend professional installation by an NGA or AGRSS certified glass technician. The windshield is a structural safety component, providing up to 60 percent of a vehicle's roof crush protection and supporting airbag deployment.
Certified techs have the urethane systems, primers, suction tools, and bonding experience to deliver a weather-tight, structurally sound install. Bring this product page or our resource hub to your installer ahead of the appointment so they have the full reference.
FOR EXPERIENCED BUILDERS Advanced DIY
Fesler glass can be installed by a skilled, experienced builder who understands urethane chemistry, has done glass work before, and has a helper on hand. This is not a first-time project.
If you're going DIY: read the Tips & Tricks PDF cover-to-cover, work through every step in our install resource hub, use the right urethane and primer for your conditions, and have someone on standby to help you set the glass. Mistakes on glass install are expensive to fix.
OFFICIAL TIPS & TRICKS PDF
The full 7-page install reference with photo examples of common defect-vs-not-defect situations, warnings, and detailed walkthrough imagery. Send it to your installer ahead of the appointment.
View Below ↓FULL INSTALL RESOURCE HUB
Stage-based FAQ for every step of your build, defect reference, troubleshooting guides, and 27 in-depth articles from beginner basics to platform-specific deep dives.
Visit Install HubQuestions about your specific build, opening condition, or installer?
Call or text the shop: 480-748-2000 · Mon-Thu 8am-5pm MST
READ THE FULL PDF.
The official Fesler Glass install reference with photo examples of common defect-vs-not-defect situations, urethane warnings, and detailed walkthrough imagery. Read it here, open it in a new tab, or download it to send to your installer.
BEST VIEWED FULL-SCREEN
For the best experience on mobile, tap "Open in New Tab" above to view the full Tips & Tricks PDF, or "Download PDF" to save it locally.
TRUSTED BY THE BEST.
The shops, builders, and fabricators who put Fesler glass in their highest-end builds. From Salt Lake City to Texas, world-class builders pick this glass for a reason.
Want to see Fesler glass on your build's portfolio? Get in touch with the shop.