ECS Tuning lab tests its fasteners to ensure they meet all 10.9 specifications.

Wheel Bolt specs:

• Diameter - 14mm
• Thread Pitch - 1.25mm
• Length - 38mm

If installing wheel spacers, measure your current wheel bolt's length and add the width of your spacer to determine correct extended bolt length. 

• 70MM, 80MM, OR 90MM OVERALL LENGTH
• OUR HIGHEST-GRADE PREMIUM WHEEL STUD
• DRY LUBE WITH BLACK M-PHOSPHATE COATING
• STUD FOR RACE/TRACK USE
• CORRECT SHOULDER SIZE FOR A WIDE RANGE OF HUBS/BRAKE ROTORS
• USE WITH 14x1.5 NUT
  
• For the very best in a race-grade wheel stud, stop looking! These are the wheel studs that our race teams insist on (after years of trying every stud design on the market). MSI Racing specializes in hardware for motorsport use (NASCAR and IMSA) and other advanced industries. We tried them on our Grand-Am/IMSA racecars and were very impressed by the performance and durability of their designs. Race wins and championships can come down to the seconds of a pitstop. We could run any wheel stud in the world and we use these. After testing them over the course of a few endurance seasons we decided to offer them to all of our customers as well.
  
  These studs are available in three overall lengths - 70.5mm, 80.5mm, and 90.5mm. All sizes are made with aircraft quality alloy steel and have roll formed threads for greater strength than cut threads. We use a dry film lubricant HM-30 coating containing Teflon & Moly over a manganese phosphate finish. Manganese is preferred over the more common zinc because it's better at reducing friction and wear to prevent thread galling. With the dry lube applied over the phosphate this is the best corrosion resistance we have seen in any wheel stud! Salt tests have shown this stud is superior to others in corrosion resistance. The dry lube helps the nut engage and glide over the threads for faster engagement without cross threading or binding. Other features of our MSI studs include a large bullet nose nut-starter and a properly sized shank to work with a wider range of BMW wheel, nut, and brake rotor combinations. We intentionally avoid the extra large shoulders you see on other studs because they can interfere with some brake rotor hats. The extra large shoulder can be too large to allow the rotor to pass through and drilling out the holes is required (not cool!) Our studs have the sufficient shank for the brake rotor without interfering.
  
  We configured these studs to have a 14x1.25 thread to go into the wheel hub. But the exposed stud has 14x1.5 threads. We did this because threading a nut is faster on 1.5 threads than a finer 1.25 thread pitch, which saved us time during pitstops. There are also more wheel nut options in 14x1.5. When you order our 14x1.25 studs make sure you also order the 14x1.5 nuts.
   

  FREE red threadlocker with purchase of a full set of wheel studs (16 or more)MSI Dry Lube Bullet Nose Wheel Stud Features:
  

• Dry film lubricant HM-30 coating containing Teflon & Moly over a manganese phosphate finish
• Innovative nut-starter and bullet shape radius that all but eliminates cross-threading
• Properly sized shank to work with a wide range of brake rotor, wheel, and nut combinations
• Heat-treated aircraft quality alloy steel
• Developed from over 20 years of top level NASCAR use
  
• These studs are installed using the traditional 'double-nut' method (one regular nut and one jam nut) with thread locking compound (Red Turbo-Lock or similar).
  
  Sold per stud.
  Wheel nuts sold separately.

Dinan's 395x34mm 2-piece 6-piston Big Brake Kit (BBK) is an ultra-high-end solution for maximum stopping power. Each feature-packed solution is specifically tailored to your vehicle and provides exceptional stopping-power in a wide operating range from daily driving to professional racing. Because of this, the system provides the correct brake bias and integrates seemlessly with the ABS and stability systems which is critical under emergency braking situations. This upgrade handily out-brakes, out-lasts, and out-performs any non-vehicle application specific OEM swap kits, and rivals much more expensive top-tier systems. Whereas most systems on the market either make heavy sacrifices to either look fancy, cut weight, or cut costs, the Dinan system is designed to simply brake better, last longer, and stand the test of time!

Features:

6-Piston next-generation weight-savings billet calipers with stainless steel pistons

2-Piece 395x34mm semi-floating discs with 72 curved directional cooling vanes

High-performance street pads (Pre-loaded, standard replacement size)

Braided stainless steel brake lines

Billet caliper mounting brackets

All necessary install hardware

Premium components, machining, and QC throughout

Low noise, vibration, and harshness

Maximum Temperature Recording systems for choosing appropriate pads and fluids

Stops quicker, lasts longer, and is more consistent than stock