SKU: 30108886597

Pontiac G8 XS3 Front Extreme Street Brake Kit

Sale price$567.00 Regular price$630.00
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Ships within 48 hours · Estimated delivery Jul 27 - Aug 1

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Description

Pontiac G8 XS3 Front Extreme Street Brake KitPontiac G8 XS3 Front Extreme Street Performance 12. 19" Brake Kit 012 0278 Note: These fit most 15" and larger wheels Note: Some G8 knuckles will need to have the caliper mounting holes drilled out to fit our 14mm bolts Kit Instructions: Click here Read Before Installing: Click Here Built with over 30 years of heritage in racing, TBM Brakes introduces its first purpose built street performance brake kit, the XS3 series featuring a 12. 19" vented

Pontiac G8 XS3 Front Extreme Street Performance 12.19" Brake Kit 012-0278 

Note: These fit most 15" and larger wheels

Note: Some G8 knuckles will need to have the caliper mounting holes drilled out to fit our 14mm bolts

Kit Instructions: Click here

Read Before Installing: Click Here

Built with over 30 years of heritage in racing, TBM Brakes introduces its first purpose built street performance brake kit, the XS3 series featuring a 12.19" vented rotor. Designed to be the bridge between our lightweight single thickness steel racing brakes and the large diameter rotor street performance brakes commonly seen in late model vehicles while providing incredible stopping power.

This brake kit was specifically designed to give the ability to run smaller diameter / factory size wheels without sacrificing braking potential. We even found this kit able to work with many steel factory 15" wheels as well as drag racing wheels. 

Features:

  • Race Inspired XS3 4 Piston Caliper
  • Billet housings machined from solid 6061 Aluminum Alloy
  • Crossflow caliper design eliminates external tubes, and promotes equal pressure to piston distribution 
  • (4) 1.75" OD pistons per caliper deliver exceptional stopping power and pedal feedback
  • Two Part Durable Powdercoated Calipers (choose color in options)
    • Race Red
    • Satin Blue Metallic
    • Velocity Yellow
    • Gunmetal Gray
    • Onyx Black
  • Black Anodized Brackets, Hats
  • Dark Zinc Plated rotors offer corrosion resistance before and after installation (please note rotor color can vary due to process)
  • Billet CNC Machined 304 Stainless Steel Pistons
  • Unique Cross flow fluid design for smoother operation
  • 12 point hardware
  • Race derived caliper design provides excellent stopping and better pedal feel
  • Made in the USA in our Bradenton, FL location!

Weight: 16.20lbs Per Side

Included:

  • (1) 12.19" vented rotors 3-121981087-1
  • (1) 12.19" vented rotors 3-121981087-2
  • (2) Billet Aluminum brake hat 205-0007BL
  • (2) XS3 4 Piston Caliper (Choose color below)
  • (2) Caliper Bracket 17-0058
  • Complete Set of Pads 6-0002HPS
  • Hardware Kit 011-0278

Innovative caliper with class leading stopping power!

The XS3 Extreme Street caliper is an innovative new design built off principles and engineering from our line of racing calipers. This all billet caliper provides ultimate in strength for a better feel and performance. With a stronger bridge strength and more rigid caliper than most aftermarket aluminum calipers we are able to provide larger clamping force to achieve the brake torque to stop your vehicle. Choose your choice of color in powdercoat. 

12.19" Slotted & Vented Rotor Balances Weight and Durability

Our cast vented and slotted 12.19" rotor was designed to balance weight, stopping power, cooling ability, and looks while keeping the ability to package with most factory and aftermarket wheels 15" and larger. These rotors are black plated to protect against rusting / corrosion and look good before first use and beyond.

Proven Brake Pad Technology:

Utilizing the Hawk Performance HPS Ferro Carbon compound, this brake pad strikes the perfect balance of stopping potential without bringing noisy brake pads and large amounts of brake dust into play.

Billet TBM Brake Hats

Our billet aluminum brake hats remove the weight of a steel center all in one rotor while allowing for minor adjustment of axle offset thanks to our unique stepped mounting design.

Note: We do not recommend the use of silicone based brake fluid with these calipers. Only use approved DOT3, DOT4, or DOT 5.1 brake fluid. We recommend using TBM Extreme 6 Fluid for best results.

To purchase TBM Extreme 6 DOT 5.1 fluid: CLICK HERE

These brakes perform and operate best at 6-800 psi brake pressure under normal braking pressure. The proper master cylinder and pedal ratio is essential to proper performance. Don't know how to calculate this? Give our team a call, we are happy to help! (800) 878-9274

For Max OD Reference of this kit for barrel fitment see below

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 30108886597

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Mark B
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★★★★★ 5
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Color: Black
I have had multiple Magnetic phone mounts, this is by far the best one yet. For the price, it is a 'must' buy, it fits perfectly on corner of screen, very tight, never an issue with bumpy roads, sharp curves, etc. You can use mount at different angles, whatever suits your needs.
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Reviewed in the United States on April 19, 2026
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David New
Waukegan, US
★★★★★ 5
Tesla Phone Holder
Color: Black
I’m using this in my Tesla and it’s super strong. Very happy with the versatility
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Reviewed in the United States on May 16, 2026
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Alice
Draper, US
★★★★★ 5
Nice Phone mount
Great phone mount—stable, easy to use, and gets the job done! I’ve been using this phone mount for a few weeks now, and it’s exceeded my expectations. It holds my phone securely, even on bumpy roads, and the adjustable arm makes it super easy to get the right angle. Installation was a breeze—took less than 2 minutes. The grip is strong without scratching the phone, and it feels sturdy overall. Highly recommend if you’re looking for a reliable mount!
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Reviewed in the United States on July 2, 2025
K
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Kye-won Ahn
Birmingham, US
★★★★★ 5
Perfect Phone Mount: Secure, Versatile, and Easy to Install!
This phone mount has truly exceeded my expectations! It’s incredibly easy to install and holds my phone securely in place, providing total peace of mind while driving. What really sets this mount apart is its impressive versatility—I've never seen anything quite like it. The base attaches firmly to the air vent, and the adjustable arm allows me to position my phone precisely where I want it, with the freedom to tilt it up, down, left, or right. Plus, it doesn’t interfere with air flow from the AC, which is a huge bonus. Although my wife's phone case isn't MagSafe-compatible, the included metal ring works seamlessly with it, and my MagSafe case connects just as smoothly. I couldn’t recommend this product more—it’s been an absolute game-changer for us! This is a personal purchase, and I’m thrilled with it. I’ll be sure to update if anything changes.
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Reviewed in the United States on November 12, 2024
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Austin T.
New York, US
★★★★★ 5
Secure and great fit
I gave this product a chance and it did not disappoint! I did not need to read any instructions for installation and was able to quickly and easily figure it out. Installation takes less than 5 minutes. Just align the mount to the top corner of your tesla screen and turn the dial to adjust the tightness. Once tightness is set, just test to see if it’s really fitted by wiggling it around to check for looseness. I like the fact that I can adjust the angles of the mount easily. My phone can be angles to be on top or side of the Tesla screen. When driving, my phone does not shake one bit. When it’s time to remove my phone, just give it a quick pull to detach and that’s it. The build quality is also very nice and I like the design of it overall. I think it’s a well thought out product. Definitely would recommend to friends and family with Teslas.
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