S550 / S650 Big Bertha Diff Bolt Kit, KellTrac Rubber Bushings
KellTrac

S550 / S650 Big Bertha Diff Bolt Kit, KellTrac Rubber Bushings

$139.99

Suspension

Specifications

Category
Suspension

Specs are taken from the manufacturer listing. Confirm fitment for your car before ordering.

Details

Avoid headaches and replace those pesky OE or aftermarket M14 sized differential mounting bolts with this KellTrac Big Bertha Diff Bolt kit. This kit includes everything you need to upgrade your S550's Diff to the largest and strongest bolt kit on the market! 

*THIS KIT IS FOR THE KELLTRAC RUBBER DIFFERENTIAL BUSHING UPGRADE KIT ONLY*

Kit Includes: Zinc Coated High Strength Alloy Steel Bolts, Grade 8 nuts, washers and HSS Drill Bit.
  • 15% larger than next strongest offering
  • 25% more clamp than next strongest offering
  • Industry's largest and strongest bolts, ASTM A574, 170,000psi Tensile Strength
  • High Quality, High Strength Zinc Coated Grade 8 Flanged Nuts
  • High Quality Name Brand HSS Drill Bit
NOTES:
***Designed for KellTrac full RUBBER bushing replacement kits that change the bolt length requirement (longer than stock bolts)***
-Due to this system being a true through bolt set-up and the bolts being larger than M14 - drilling of all bushing/mount locations is required
-Due to the massive size difference of this kit compared to others, minor modification (grinding) needs to be done on the fore side of the rear diff cover mounts
-We recommend torquing to 185ftlbs with a "dab" of name branded Blue Loc-Tite.


KellTrac shipping & returns

  • Shipping: most in-stock orders ship the next business day (no weekend processing).
  • Returns: products that are defective in manufacturing or workmanship, and orders shipped with the wrong product, are accepted for return.
  • Shock and coilover orders ask for your tires, transmission, rear geometry, surface and power so the valving is built for your car.

To start a return or ask a question, contact us with your order number.

Fitting available at the shop — ask about installation.