This upgrade kit allows seamless conversion from any Milltek Sport stainless steel axle back configuration to the premium Signature Series titanium axle back system. Engineered from high-grade titanium, this system offers superior strength, significantly reduced weight, and enhanced resistance to high temperatures and corrosion. Ideal for high-performance applications, it delivers long-term durability, a sharper acoustic profile, and optimized thermal efficiency compared to traditional stainless setups. Specifications - Direct upgrade path from Milltek Sport stainless axle back to Signature Series titanium system - Titanium construction provides improved strength-to-weight ratio and heat resistance - Enhanced corrosion resistance for long-term durability - Refined, lightweight design ideal for track or road applications