BMW 4 Series Large

$149
This is the best windscreen / windblocker / wind deflector / windstop you can get for your BMW 4. Enjoy the best of top-down driving again with a Windblox Convertible Windscreen.
Base Price:
$149
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BMW 4 Series Large

BMW 4 Series Large

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About This Product

Specification For BMW 4 Series Large Wind Deflector

$149

Windscreen Performance:

  • No Wind. The Windblox BMW 4 Series Large windscreen significantly reduces turbulence in the cockpit.
  • No Glare. Windscreen does not emit glare, preventing dangerous driving conditions.
  • No Noises. This windscreen creates an audibly pleasant cockpit.

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Guarantee:

  • 30 day refund period on unit cost if not satisfied.
  • Free shipping back. If for some rare reason you are not satisfied with this windblocker, then we will pay the shipping back from US addresses for the product refund.
  • Lifetime Warranty: This windscreen will outlast your car – guaranteed.

Fits Models:

Fits all model years, including the new 2009+ BMW 4 body style.

Base Cost: The base cost is for a reinforced acrylic windblocker, nylon straps, no tint, and no satchel.

Thickness: This windscreen is constructed of 1/4 thick material

Guarantee:

  • 30 day refund period on unit cost if not satisfied.
  • Free shipping back. If for some rare reason you are not satisfied with this windblocker, then we will pay the shipping back from US addresses for the product refund within the 30 day period. We will do so as happily as when we processed your initial order.
Benefits:
  • Prevents unrelenting wind buffeting and driver fatigue. Fulfills the purpose of your convertible, of enjoying the sun while driving about, without getting beat-up by the backwash of wind.
  • Talk clearly on your cell phone.
  • Arrive with your hair in place and free of tangles, especially long hair. Wives are the biggest fans of my products.
  • Light weight.  Very easy to maneuver.
  • Best for long term wear.  This windblocker will continue to look like new after many years of active service.
  • Extend the season. Able to go top-down on crisp winter mornings and cool summer nights.
  • Wives are the number one fan of this product.
  • Clear, no visual impedance, especially at dusk.
  • Carry on conversations with your passenger without straining your voice.
  • A much quieter cockpit. You'll be able to hear yourself think again.
  • Enjoy the full richness and clarity of your stereo.
  • Take long trips comfortably.
  • Cruise at night without freezing from cold drafts.
  • Cleans easily with soap and water.
Features:
  • Windblocker remains in place with top-up.  Do not need to take off & on. Can be used in any degree of weather; material rated for -30 degrees to 125 degrees (-35 to 52 degrees Celsius.
  • Large surface area blocks significant turbulence; excellent performance.
  • Constructed of high scratch/buff resistant material with gloss finish. Your windblocker will continue to look like-new many years after regular service.  We have customers who've been using my windblocker over seven years in their car, and their windblocker still looks great.
  • Constructed of cast material for extra rigidity, better performance, and lasting life. (Lesser material vibrates and flexes from the turbulence, causing annoying side effects and abrasion against the roll hoops.)
  • Tough fasteners. Customers drive at three digits speeds for hours across Montana with this windblocker in place.
  • Mounts slightly tilted preventing night time glare.
  • Off-and-on in seconds, simplest of installations.
  • Environmentally Friendly. The material uses polymeric compositions, which means less petroleum is used in the production and manufacturing, providing a higher quality.
  • Precision. Windscreen is even, square, symmetrical, and balanced.
  • Clear, no visual impedance, especially at dusk.
  • No permanent modifications for the attachment system; windblocker installs with no changes to the cockpit whatsoever. No drilling, glues, or adhesives to permanently mar your car.
  • Scratch Resistant. Made from premium double sided AR Polycarbonate, the best available material in the marketplace for this application. This material carries a 15 year rating to look as new as the day you purchased it. It is scratch and buff resistant, and resists impacts.
  • Smudge Resistant. This material for this windscreen resists smudges from hand and fingerprints, so your windscreen remains looking crystal clear even when handled. This windscreen requires less cleaning and polishing.
  • Easy no tool installation.
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Options

Lexan Upgrade: +$15


Examples of Lexan applications

This option is for 1/4 inch abrasion resistant Lexan material.This material is a virtually indestructible material suitable for high impact applications, such as bullet resistant windows, boat windshields, lightweight bicycle gear sprockets, etc. This is abrasion resistant lexan, with a 10 year manufacture's warranty, and does not yellow with sun exposure. Paradoxically, lexan is actually a soft material, so this AR Polycarbonate is specially formulated lexan designed to resist minor scruffs, wear, and constant exposure to the elements. You will come to very much appreciate this abrasion lexan offered only by Windblox for years after your purchase.

Invisible Straps: +$10

(Contrasting against the standard nylon webbing)
  • Optional clear straps makes your windblocker look invisible.
  • All straps are 5/8 inches wide. Standard straps are black, (The black nylon straps are already included in the base cost.) of nylon webbing. The invisible straps of clear vinyl.
  • The clear vinyl is tough and pliable, will not weaken or become brittle or yellow with age.  This is the same material used on garden sheds, boat windows, and other abusive-prone environments.
  • Strong material. Each straps by itself is rated to carry the pressure of the windblocker, so having multiple straps is over-engineering.
Tints: Smoke or Bronze: +$10.   Blue, Orange, Yellow, and Red: +$15


Clear: No tint for comparison

  • The tints are infused in the material - it is not an overlay material.
  • Optional smoke or bronze tints are available for +$10.
  • Optional colored tints (blue, orange, yellow, and red) are available for +$15, and may take up to an extra week for shipping.
  • Only the smoke tint is available with lexan.

The smoke tint condensed for photographic purposes. This tint is a hew of gray, more of a neutral color

Smoke tint in use
+$10

Red tint in use
+$15

Yellow tint in use
+$15

The bronze tint condensed for photographic purposes. This tint is a hew of red

Bronze tint in use
+$10

Blue tint in use
+$15

Orange tint in use
+$15
Glass Edge: +$15

Glass Edge Green Edge

Looks like glass. This option give the windscreen edge the look of glass, of a dim green glow. This tint is visible when viewed from the edge, and not within the main body surface. Note: this option is available only with clear acrylic. It is not available with lexan or other tints.

Rubber Edge: +$40

Rubber Bead Windscreen Windscreen Rubber Edge Wind Deflector Rubber Edge Rubber Edge

Here is the rubber edge around the perimeter of a BMW Z3 windscreen. A rubber bead protects against dropping and abrasion against your car, attached to the perimeter of the windscreen.

Customized Engraving: +$35
BMW 4 Windscreen Etch BMW 4 Windscreen Etch
#1 -Z4 Logo #2 - BMW Logo

Frequently Asked Questions

Three Top Questions

1) Can you leave the windscreen in place while raising and lowering the top?
Yes, you can. Many customers simply leave the windscreen mounted on their car most of the year.

2) What color are the straps?
For the BMW 4, the straps are gray.  There's also a $10 upgrade to clear straps.

3) Does the bottom of the windscreen rub against the car?
No, the fastening lifts the windscreen up off the bottom to eliminate bottom-side wear, and is cushioned against the car to preventing abrasion.

4) Will the windscreen fit under the 2009+ hard top?
Yes, it will.

5) Is this difficult to install?
Definitely not. Elementary age children install these windscreens.

6) Could the wind deflector chatter when in use?
No, the fastening system holds the windscreen very secure to the car. This windscreen is tested to 150 MPH.

7) What is the difference between acrylic and lexan?
Acrylic is about 18x stronger than glass; Lexan is about 61x stronger

8) Doesn't acrylic or lexan yellow in sunlight?
Some manufactures with less quality might, but not Windblox.

9) Could the windblocker induce any sort of wear?
Never. Since the windscreen is secure in place, there is no movement between the windscreen and the car, so there is no wear.

10) How long does this wind deflector last?
With regular care and handling, your windscreen will last the lifetime of your car.

11) Is the tint an overlay film?
No, the tint is infused in the material, which resists scratches and abrasions.

12) Should I get a tint?
Tinting is a color preference, so it really depends your individual taste; however, the smoke tint is our favorite, and what we use.

13) Does the tint inhibit rear view vision?
No - it's like looking through sunglasses.

14) Does the windstop cause glare at night?
No. First, the windscreen is made of a specialty glare resistant material. Second, the windscreen mounts at a slight angle, to further cut glare.

15) Does this windscreen interfere with the boot cover?
No, it does not.

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LEARN MORE

Five Top Advantages

1) Which is Which?
One of these windscreens is brand new; the other is eight years old. The old screen was borrowed from a first customer, sold back in November of 1999 for a BMW Z3. The used windscreen has been in active use since. The customer estimate he drives top-down 140 days per year. He leaves the windscreen in the car about ten months a year, taking it out and storing it during the raining months of December and January. Can you tell which windscreen has a thousand days top-down use and 3000+ days mounted in the car, and which windscreen is brand new?

2) Stronger Material
#1) This is a sheet of ordinary 1/4 inch (635 mm) acrylic. The deflection bottoms out, more than three inches (7.6 cm).; This is the windblocker material used by other vendors. #2) This is a sheet of 3/8 inch (953 mm) of polycarbonate acrylic.  Despite being thicker than Windblox, this wind deflector still deflects 50% more; the deflection is just over 1.5 inches (3.8 cm). #3) Windblox's material deflects less than 7/8 inch (2.2 cm) under the same weight.

3) Edging Cut The Right Way To Cut
#1) A customer traded in this particular windblocker, purchased from another vendor.  This windscreen was fabricated upon a shop table router. The cut and workmanship is inconsistent, with nicks and gouges. #2) This wind deflector was cut upon double sided AR Polycarbonate acrylic, using a CNC router.  While the cut is smooth, machinery marks are prominent. #3) Windblox's windscreens are cut using a five thousand watt laser, ensuring a crystal clear cut with a polished finish.

4) Resists Fractures
A customer experienced this fracturing with a wind deflector purchased from another vendor. From the continual movement and stresses, combined with inferior material, micro-stress cracks emerged. These cracks grew over time, until the windscreen became unstable.

This picture is a close-up from of a slot from a customer's Windblox BMW Z3 windstop, continually mounted on his car since November 2002.  Since Windblox uses the best available material, it wears well over time, remaining crisp and clear.  (Photo taken June 2009.)

5) 15 Years
Windblox windscreens are constructed from materials providing a 15 year scratch and mar resistant rating.  Against daily and constant use, your windscreen remains clear throughout its life.

6) Lifetime Warranty
Windblox is the only manufacture warranting against buffs and abrasions. Your windscreen will be clear for the lifetime of your automobile.

7) No Squeaks or Rattles
Windblox windblockers are securely held in place, with no movement between the windscreen and your car.  This prevents annoying high pitch squeaks and rattles when driving with your windscreen

8) Easy Installation
This wind deflector is most simple to install.  A 12-year old niece of a staffer installs these windscreens in two minutes.

9) Does Not Induce Abrasion Against Your Car
Windblox windstop does not rub against your car, preventing ongoing abrasion and wear. This is a picture from a customer's car.  She purchased a windscreen from a different vendor.  After eight months continually mounted on her car, the poor fit caused accumulated wear against the roll hoops

10) Does Not Yellow from Sun Exposure
At one point, this windscreen (from another vendor) was clear.  This customer lives in Texas, and had this windscreen mounted on his car for four years, before it became unusable.  Windblox windscreens are guaranteed not to yellow from sun exposure.

11) Anti Wobble
No wobble.  Windblox windblockers remain secure when in use.  The windscreen does not wobble or vibration when, even at high speeds.

12) Made For Speed
Windblox wind deflectors are rated for 150 MPH (250 KM/hr).

13) Utilitizes Green Processes
All cast-off material is recycled.  Base material incorporates soybean based oils instead of all petroleum, increasing use of renewable materials.

14) Laser Fabrication
All Windblox wind deflectors are cut on a 5,000 watt laser (normal power for this process is 100 watts), providing exceptionally clear cuts.