CTS Turbo - 1.8T Throttle Body Spacer - TT Mk1 1.8TCTS Turbo is now offering throttle body spacers for the 1. 8T engine. These spacers offer a injection point for water meth systems as well as increasing the plenum volume. This increase will aid in boosting the midrange torque of the vehicle. Included in the kit is the spacer, 2 OEM gaskets and 4 extra long machine bolts. Easily add water meth injection to your 1. 8T 20V engine. 1 8 NPT port, compatible with most watermeth nozzles.