Biltwell's custom-built 1" OD x .120" wall seamless 4130 chromoly tubing is the perfect choice for high-performance applications. Each bend is made using an internal mandrel on a CNC bender, ensuring smooth, flat-free curves. The precision-mitered joints are TIG-welded for strength and reliability. Designed for aftermarket and custom builds, this tubing is not notched for TBW applications. It also meets the necessary homologation standards, with TEILEGUTACHTEN GTÜ TGA - 19043.00 and TGA19043.02 certifications, ensuring top-quality performance for serious enthusiasts and racers alike.