The APR high-performance ignition coil packs are designed as a direct upgrade for the Audi 2.9 TFSI / 3.0 TFSI engines found in the Audi S4 / S5 B9 and RS4 / RS5 B9 models. These APR coils, sold in a set of 6, serve as a direct replacement for the standard OEM coil packs, offering both a more stable..