Sold as a complete set of four.  

This is a set of billet adapters to retrofit FSI or TSI coilpacks to your 1.8T with bolt down coilpacks.  The FSI/TSI coilpacks allow you to run a larger spark plug gap, while maintaining a strong spark output. Testing has shown a smoother idle with these coilpacks, increased off boost power, and in some cases improved fuel economy.  Replace your old bolt down coil packs with the newest VAG technology.  You can use any FSI or TSI coilpacks with these, which we sell separately.  Available in raw billet, IE red anodize, or black anodize finishes.  These require the use of a Integrated Engineering Coil Conversion and ICM Delete Kit for installation.  

What else is needed:
Integrated Engineering Coil Conversion and ICM Delete Kit for 058 1.8T
and
Red/black FSI Coilpacks (4)
or
Black TSI Coilpacks (4)