Billet Output Shaft

Features:

• Heavy-duty billet steel output shaft for Allison transmissions

• Designed to handle extreme torque loads in performance and towing applications

• Precision-machined for a perfect fit and enhanced drivetrain strength

• Ideal for high-horsepower Duramax builds running large turbos or nitrous

• Heat-treated and stress-relieved for superior durability under load

• Drop-in replacement for factory output shaft

The SunCoast A1-109100 Billet Output Shaft is the ultimate upgrade for 2001–2010 GM 2500HD/3500HD trucks running the 6.6L Duramax with an Allison transmission. Stock output shafts are known to fail under heavy load or in high-power builds, making this billet shaft a must-have for anyone pushing their truck to the limit. Whether you're drag racing, sled pulling, or towing on a regular basis, this shaft provides the strength and reliability your drivetrain demands.

Fitment: 2001–2010 GM Silverado/Sierra 2500HD / 3500HD 6.6L Duramax (Allison Transmission)
Warranty: 1-year limited warranty from SunCoast
Fitment Notes: Designed for use with Allison 1000/2000 transmissions. Professional installation recommended. Works best when paired with other drivetrain upgrades.