the TS-1 is designed to handle extreme EGTs and high boost with ease

Car Only - A4

1974-1981     E12     518 / 520

Dimensions are approximately 8″X4″

BMW N54 Head Stud Thread Insert Kit 11 23 7 557 561 the TS-1 is designed toThe BMW N54 Head Stud Thread Insert Kit provides your machine shop everything needed to repair or upgrade the engine block threads on BMW N54 engines. Designed for precision and durability, this kit allows you to restore damaged threads or prepare the block for oversized head studs for improved clamping strength. Please note, this product does NOT include head studs. Head Studs are available for purchase here. Each BMW N54 Head Stud Thread Insert Kit