How much longer do the bolts need to be in order to work on a Z71?

The bolts are fine. Pretty sure you won't be able to use the front skid plate for z71. And use the instructions for same kit made by rough country. Can down load from there website

Will these fit for a 2008 silverado with a 7.5 inch lift? cant quit chewing through cv axles

I used these on a 2013 Tahoe with a 7.5 RC lift. It fit and helped out my cv angle and the extra drop did not make my CV joints bind at full compression. However I did have to drop the front of my skid pan with some 1/4 spacers for just a little for clearance bc the chunk was just touching the skid pan on the front side. Maybe that helps

Do these spacers go between the diff bracket and fame or between the diff and diff bracket?

Between the diff bracket and frame. It drops the whole bracket down

Mzs Differential Drop Kit Compatible With 2007 2021 Silverado Sierra

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Description

🚙 Elevate your ride, drop the vibrations, and drive with confidence!

VIBRATION FREE RIDE - Eliminates front differential vibrations post-lift, enhancing driving comfort and reducing CV joint wear.
PROLONGS VEHICLE LIFE - Improves axle alignment to reduce wear and tear, protecting your investment and keeping you road-ready.
EFFORTLESS INSTALLATION - Bolt-on design requires no special tools, letting you upgrade your suspension in just 1-2 hours.
PRECISION ENGINEERED DURABILITY - Crafted from corrosion-resistant CNC machined T6 billet aluminum for unmatched strength and longevity.
OPTIMIZED FIT FOR SILVERADO SIERRA - Specifically designed for 2007-2018 6-lug 4WD models, ensuring perfect compatibility and performance.

The MZS Differential Drop Kit is a precision CNC machined T6 billet aluminum spacer designed to lower the front differential by 1 inch on 2007-2018 Silverado 1500 and Sierra 1500 4WD 6-lug models. This bolt-on kit reduces vibrations caused by lift kits, improves axle alignment, and extends CV joint life. Easy to install without special tools, it features corrosion-resistant anodized coating for durability and is a must-have upgrade for lifted trucks seeking smoother, longer-lasting performance.

Specifications

ASIN	B0978JPRBD
Brand	MZS
Country of Origin	USA
Customer Reviews	4.1 4.1 out of 5 stars (84)
Date First Available	21 June 2021
Exterior	Smooth
Inner Material	Aluminum
Item Weight	839 g
Item model number	Diff drop spacer 05
Manufacturer	MZS
Manufacturer Part Number	005 Differential Drop Kit
Material	Aluminum
Model	Differential Drop Kit
Outer Material	Aluminum
Package Dimensions	19.41 x 7.29 x 6.2 cm; 839 g
Position	Front
Special Features	MZS Differential Drop Kit fits 2007-2018 Silverado 1500 4x4,2007-2018 Sierra 1500 4x4, MZS differential drop kit are easy bolt-on installation in 1-2 hours without special tools, MZS is a professional supplier who always supply high quality vehicle accessories.

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