APR Iridium Pro Spark Plug 14X19X16mm | VW · Audi B7 S4 4.2L V8 Works flawlessly with all IE

Works flawlessly with all IE ECU Tunes

Set it to stock

Clutch clamping forces are increased so the transmission can safely handle much more power

0 TSI engine and transmission

Creating performance-oriented products that help shed unnecessary weight without sacrificing style is our specialty

APR Iridium Pro Spark Plug 14X19X16mm | VW · Audi B7 S4 4.2L V8 Works flawlessly with all IEAPR Iridium Pro Spark Plugs are the excellent upgrade for tuned engines. Our spark plugs are made from Iridium, which is one of the strongest materials you can use in this type of application. They run cooler, resist preignition, last longer than other materials with higher melting points, and even require less voltage to produce a strong spark. The electrode is harder and stronger than other materials, can dissipate heat more easily, is better